ThinkPad 340 / 345

Introduction: The ThinkPad 340 and 345 series were budget-friendly, entry-level notebooks offering essential computing power for the mid-1990s.

The following table shows an overview of the system features.

Feature	Description
Processor	° 340 - IBM486 SLC 25/50MHz on the system board ° 340CSE - IBM486 SLC2 25/50MHz on the system board - IBM486 SLC2 33/66MHz on the system board
Memory	4MB (on the system board)
(Standard)
Memory	2MB, 4MB, 8MB, IC DRAM card (12MB is maximum)
(Option)
CMOS RAM	128 Bytes
VGA Video	° 340 - 9.4-inch 64 gray level DSTN LCD monochrome ° 340CSE - 9.4-inch 256 color DSTN LCD color - 10.4-inch 256 color DSTN LCD color
Diskette	° 0.720MB, 1.44MB (2-mode) 3.5-inch
Drive	(for U.S. and European countries) ° 0.720MB, 1.2MB, 1.44MB (3-mode) 3.5-inch (for Japan)
Hard Disk	° 340
Drive	- 125MB 2.5-inch ° 340CSE - 200MB 2.5-inch - 360MB 2.5-inch
PCMCIA	One Type III or Type II

General Checkout

Use the following procedure as a guide for computer problems. The diagnostic tests are intended to test only IBM products. Non-IBM products, prototype cards, or modified options can give false errors and invalid system responses.

1. Obtain the failing symptoms in as much detail as possible.- Verify the symptom. Attempt to recreate the failure by running the  diagnostic tests or retrying the same operation.

   NOTE: To run the diagnostics, refer to 'How to Run the Diagnostics'

   • Use the following table with the verified symptom to determine  which page to go to. Search the symptoms column  and find the description  that best matches your symptom; then go to the page shown in the Go to column.

   Symptom	Go to
   Power failure. (The power indicator does not go on or stay on.)	'Power Systems Checkout'
   POST does not complete. No beeps/error code are indicated.	'Symptom-to-FRU Index' and then use the 'No Beep Symptoms' table.
   POST beeps, but no error codes are displayed.	'Symptom-to-FRU Index' and then use the 'Beep Symptoms' table.
   POST detected an error and displayed numeric error codes.	'Symptom-to-FRU Index' and then use the 'Numeric Error Codes' table.
   The diagnostic test detected an error and displayed an FRU code.	'FRU Codes'
   The configuration is not the same as the installed devices.	'Checking the Installed Devices List'
   Other symptoms (such as LCD display problems).	'Symptom-to-FRU Index', and then use the 'Table for Related Symptoms'
   Symptoms cannot be recreated. (Intermittent problems.)	Use the customer reported symptoms and go to 'Symptom-to-FRU Index'

Use either the TrackPoint II or III or the cursor move keys to interact with the tests. The Enter key works the same as selecting the OK icon to reply OK.

1. Press and hold the F1 key, then power-on the computer.  Hold the F1 key down until the Easy-setup screen appears.- Select Test and press Enter.- Select a device and press Enter to run the test.- The test progress screen appears.- OK appears when the test ends without any errors.- Start the Advanced Diagnostic test by pressing Ctrl+A on the basic diagnostic menu screen.- Select Tool to install the tools.- Select a device, press the space key, and  install the tool. Multiple devices can be selected by repeating  this step.

              A **OK Check Mark** appears for the selected device.
            - Select **OK** and press Enter
               if the selection is OK.- Select a device and press Enter to start the tests.- Select **Test All** to test all devices.- Select **Loop Test** to loop tests.
   
                     A loop option menu appears in which a device loop or all loop can be
                     selected. Select a device and press the **space** key to select
                     a device. Repeat this step to select multiple devices.
                     Press Enter to start the diagnostic loop. If no device is selected,
                     all device tests are looped.
   
                    - To exit the loop,
                       keep pressing **Ctrl+Pause** until the test exits.
   

Do the following to run the keyboard test.

1. Go to the advanced diagnostic screen menu by pressing Ctrl+A in the Easy-Setup menu.
2. Go to the keyboard diagnostic test menu by pressing Ctrl+K .
3. Check that when each key is pressed, the key position on the  keyboard layout on the screen changes to a black square.

NOTE: When a Fn key is pressed, the black square briefly appears.

  Numeric Error Codes

The Symptom-to-FRU Index lists the symptoms, errors, and possible causes. (It can be used to help you decide which FRUs to have available when servicing the computer.) The most likely cause is listed first.

Perform the FRU replacement or actions in the sequence shown in the FRU/Action column. If a FRU does not solve the problem, put the original part back in the computer and perform the next action.

Numeric error codes show the errors detected in POST or system operation. In the following error codes, X can be any number.

If no codes are available, use narrative symptoms.

If the symptom is not listed, go to 'Undetermined Problems'

NOTE: For IBM devices not supported by diagnostic codes for the Model 340 and 340CSE, see the manual for that device.

Symptom/Error	FRU/Action
10X	1. System Board
110	1. Go to 'Memory Checkout' 2. IC DRAM Card 3. System Board
111	1. Go to 'Memory Checkout' 2. System Board
161	1. Go to 'Checking the Backup Battery' 2. Backup Battery 3. System Board
163 (Time and Date was not set.)	1. Set Time and Date. 2. System Board
173 (Configuration data were lost.)	1. Select OK in the error screen, then set time and date. 2. Backup Battery 3. System Board
174 (Perform 'Checking the Installed Devices List' before changing any FRUs.)	1. Check Device Configuration. 2. System Board 3. Diskette Drive Assembly 4. Hard Disk Drive Assembly
184 (POP check sum error.)	1. Reset the POP in Easy-Setup.
190 (A depleted battery pack was installed when the power was on.)	1. Go to 'Checking the Battery Pack'
191XX	1. System Board
199XX	1. System Board
1XX	1. System Board
2XX	1. Go to 'Memory Checkout' 2. IC DRAM Card 3. System Board
301, 303, 304, 305, 3XX	1. Go to 'Keyboard / Auxiliary Input Device Checkout' 2. Keyboard 3. External Numeric Keypad 4. External Keyboard 5. Keyboard/Mouse Cable 6. System Board
601, 6XX	1. Go to 'Diskette Drive Test' 2. Diskette Drive Assembly 3. Diskette 4. System Board
602 (Diskette read error.)	1. Go to 'Diskette Drive Test' 2. Diskette 3. Diskette Drive Assembly
604 (Non-acceptable ID was read from the diskette drive.)	1. Go to 'Diskette Drive Test' 2. Diskette Drive Assembly 3. System Board
11XX	1. Serial Device (First) 2. Communication Cable 3. System Board
12XX	1. Serial Device (Second) 2. Communication Cable 3. System Board
17XX	1. Hard Disk Drive 2. System Board
24XX	1. System Board
808X	1. PCMCIA Slot Assembly 2. PCMCIA Device 3. System Board
860X (Pointing device error when TrackPoint II or III is disabled.)	1. External Mouse 2. External Keyboard 3. System Board
861X (Pointing device error when TrackPoint II or III is enabled.)	1. Reseat the keyboard TrackPoint II or III cable. (See '1080 Keyboard Unit') 2. Keyboard 3. External Mouse 4. System Board
I9990301	1. Reseat the boot device.
I9990302	2. Check the startup sequence
I9990305	for the correct boot device. 3. Check that the operating system has no failures, and is installed correctly.
I9990303	1. System Board
Other codes not listed above	1. Go to 'Undetermined Problems'

If an error is detected by the diagnostic tests, a four-digit FRU code is displayed. The FRU code indicates two suspected FRUs. Replace the FRU that is indicated by the two leftmost digits first, then replace the FRU indicated by the two rightmost digits. No FRU is assigned to code 00. If only one FRU is suspected, the other FRU code is filled with zeros. See the referenced page before replacing the FRU.

FRU Code	FRU/Action
10	System Board
20	Memory 'Memory Checkout'
30	Reserved
32	External Keyboard
33	External Mouse
40	LCD Assembly
45	External CRT
50	Reseat the Diskette Drive Diskette Drive
60	Reseat the Hard Disk Drive Hard Disk Drive
81	Internal Modem Card (if installed)
90	Reserved

NOTE: The device ID and error codes are used to indicate the detail portion of the FRU which caused the error. If replacing a FRU does not correct a problem, see the Device ID or error code from the previous failure. If they have changed, the cause might be because the new FRU is defective or that the FRU was incorrectly installed.

If the problem remains after replacement of the FRUs, go to 'Undetermined Problems'

Symptom/Error	FRU/Action
No beep, power-on indicator not on, and a blank LCD during POST.	1. Go to 'Power Systems Checkout' 2. System Board 3. Power Sources
No beep, power-on indicator on, and a blank LCD during POST.	1. System Board
No beep, power-on indicator on, and a blinking cursor only during POST.	1. System Board
No beep during POST, but system runs correctly.	1. Turn the volume up and listen. to the speaker 2. Speaker

Symptom/Error	FRU/Action
Continuous beeps.	1. System Board
One beep and a blank, unreadable, or flashing LCD.	1. Reseat the LCD connector '1090 LCD Assembly' 2. LCD Assembly 3. System Board
One beep, and the message, Unable to access boot source	1. Reseat the boot device. 2. Boot Device 3. System Board
One long, two short beeps and a blank or unreadable LCD.	1. System Board 2. LCD Assembly
One long beep followed by four short beeps each time the power switch is operated (System cannot power-on due to low battery voltage.)	1. Connect the AC Adapter or install a fully-charged battery
One long and one short beep.	1. System Board
One beep every second. (System is shutting down due to low battery voltage.)	1. Connect the AC Adapter or install a fully-charged battery (allows the system to completely shutdown before the battery is charged)
Two short beeps with error codes.	1. POST error. See 'Numeric Error Codes'
Two short beeps with blank screen.	1. System Board

Intermittent system hang problems can be caused by a variety of reasons that have nothing to do with a hardware defect such as: cosmic radiation, electrostatic discharge, or software errors. FRUs replacement should only be considered when a recurring problems exists.

When analyzing the intermittent problem, do the following:

1. Run the advanced diagnostic test for the system board in loop mode  at least 10 times.
2. If no error is detected, do not replace any FRUs.
3. If any error is detected, replace the FRU shown by the FRU code.  Rerun the test to verify that no more errors exist.

  FRU Removals and Replacements - ThinkPad 340x/345x

This section contains information about removals and replacements.

• An electrostatic discharge (ESD) strap must be used to establish  personal grounding. The system board is sensitive to, and can

be damaged by,   electrostatic discharge. Establish personal grounding
 by touching a ground point with one hand before touching these units.- Do not damage any part. Only certificated and trained personnel  should service the computer.- The arrows in the “Removals and Replacements“ section show  the direction of movement to remove a FRU, or to turn a screw to release  the FRU. The step number with the arrow shows the  correct sequence of removal.  The circled numbers are sub-steps of the main step.- When other FRUs must be removed before removing the failing FRU,  they are listed at the top of the page.- To replace a FRU, reverse the removal procedure and follow any  notes that pertain to replacement. See 'Locations' for internal  cable connections and arrangement information.- When replacing a FRU, use the correct screw size as shown in the  table of each section.

  pleaseREAD**** - see

Locations - ThinkPad 340x/345x

System (Front View)

1 LCD

2 Contrast Control

3 Brightness Control

4 Status Indicator

5 Keyboard

6 LCD and Keyboard Latch

7 Click Button

8 Diskette-Eject Button

9 Diskette Drive

10 Fn Key

11 TrackPoint II/III

Common Parts Listing

This section contains FRUs common to most IBM portable, laptop, and notebook computers.

External Diskette Drives

5.25-Inch Diskette Drives:
360KB External (4869-001)	72X6759
360KB External (4869-501)	72X6768
1.2MB External (4869-002)	15X7993
1.2MB External (4869-502)	15X7994
Hard Disk Drive.
1.2GB HDD (for all 9545)	85G8549
5.25-Inch Drive Adapter	72X6757
5.25-Inch Drive Adapter/A	15F7996
5.25-Inch External Diskette Drive Cable
(from system board to adapter)	27F4211
Diskette Drive Bus Adapter	72X8524

CD-ROM Drives

Enhanced Internal CD-ROM II Drive
(Eject button below slot)	61G1901
Internal CD-ROM I Drive
(Eject button above slot)	81F7930
Terminator Kit (for 81F7930)	59F3530
Cleaning Kit (for 81F7930)
(Disks, CD Caddy)	59F3562
Internal CD-ROM II Drive
(Eject button below slot)	92F0084
Terminator Kit (for 92F0084)	92F0082
Media Kit (for 92F0084)
(No cleaning necessary,
Test Disk, CD Caddy)	31F4232
Signal Cable	34F0043
Power Cable	72X8521
Remote ID Switch Cable (3510)	92F0086
Audio Card, Cable, Screws (3510)	92F0085
CD Caddy	22F9419
Rail Kit (3510)	34F0041
Headphones	53F3610

SCSI Adapters, Terminators, Cables

SCSI Adapter/A (without Cache)	85F0002
SCSI Internal Cable	64F4127
SCSI Adapter/A (with Cache)	85F0063
Terminator, External (for 85F0063)	33F8464
Terminator, Internal (for 85F0063)	34F0025
Terminator, Internal (for 85F0002)	57F2870
SCSI Fast Adapter (16 bit)	92F0330
SCSI External Cable (for 92F0330)	32G4089
SCSI Internal Cable (for 92F0330)	32G0084
Terminator, Inline (space permitting)	92F0412

Rewritable Optical Drives

3.5-Inch Rewritable Optical Drive	92F0167
Rewritable Optical Cartridge	38F8647
Rewritable Optical Cartridge (5 Pack)	38F8646
Drive Mounting Slide (for 92F0167)	85F0022
Tray with Bezel (for 92F0167)	85F0021
Objective Lens Cleaner (for 92F0167)	38F8681
Prism Lens Cleaner (for 92F0167)	38F8682
3.5-Inch Enhanced Rewritable Optical Drive	92F0167
Mounting Tray	92F0269
Mounting Tray/Bezel (Model 3510)	92F0268

External Keyboard/Mouse

Keyboard Cable	72X8537
Mouse	61X8923
Mouse Ball and Pop-Off Retainer	33F8461
Mouse Ball and Twist-Off Retainer	33F8462
Mouse (New Style) (33G5420)	06H4595
Mouse Retainer Ring	33G5417
Miniature Mouse	95F5723

Enhanced Keyboards (101/102 Key)

Country	FRU P/N
Arabic	1391490
Belgian	1391414
Canadian French	1392011
Cyrillic	1393866
Danish	1391407
Dutch	1391511
French	1391402
German	1391403
Greek	1393285
Hebrew	1391408
Italian	1393395
Latin American Spanish	1392015
Norwegian	1391409
Portuguese	1391410
Russian/Cyrillic	1395622
Spanish	1391405
Swedish/Finnish	1391411
Swiss	1391412
Swiss/French	1395881
Swiss/German	1395882
Turkish	1393286
U.K. English	1391406
U.S. English (E/ME/A use only)	1396790
U.S. English	1392090
Yugoslavian	1393669

Optional Enhanced Keyboards (101/102 Key)

with PS/2 Style Cable	59G7980
with AT Style Cable	59G7981
with 25mm PS/2 Trackball	59G7982
with 25mm Serial Trackball	59G9757

Keybutton Kits (101/102 Key)

Keybutton Kits (R), Belgian	1392033
Keybutton Kits (R), Canadian French	1392032
Keybutton Kits (R), Danish	1392026
Keybutton Kits (R), Dutch	1392034
Keybutton Kits (R), French	6447047
Keybutton Kits (R), German	6447048
Keybutton Kits (R), Italian	6447049
Keybutton Kits (R), Norwegian	1392028
Keybutton Kits (R), Portuguese	1392029
Keybutton Kits (R), Spanish	6447050
Keybutton Kits (R), Spanish / Latin	1392035
Keybutton Kits (R), Swedish	1392030
Keybutton Kits (R), Swiss / French / German	1392031
Keybutton Kits (R), U.K. English	6447046
Keybutton Kits, U.S. English	6447045

Japanese Keyboard Type 2 (106 Key, DBCS Support)

Japanese Keyboard	94X1110
Keyboard Cable	94X1147

Space-Saving Keyboards (84/85 Key)

Canadian French	1396046
Spanish/Latin	1396047
U.S. English	1393290
Cable Assembly, External	1393082

Tools and Miscellaneous

Audio Wrap Cable	66G5180
Ethernet BNC T-Connector	84F8207
Ethernet BNC 50-ohm Terminator
(2 required)	85F0037
Grounding Wire Set	38F4684
Keyboard Key Cap Removal Tool	6110464
PC Test Card	33G4703
Screwdriver Kit	95F3598
SCSI Terminator
(any SCSI device, space permitting)	92F0142
SCSI Terminator Kit
(R-PAC Terminator Modules (3) for 40, 60,
80, 120, and 160MB SCSI Hard Disk Drives)	92F0143
Wrap Plug Ethernet D-Shell	85F0036
Wrap Plug, Tri-Connector	72X8546
Wrap Plug (6157 Tape Attachment Adapter/A)	4178459
Wrap Plug (Token-Ring Network Adapter/A)	6165899
Plastic Envelope (For Wrap Plug)	6138013

ThinkPad Common Parts List

 Safety Notice 8

Before removing any FRU, power-off the computer, unplug all power cords from electrical outlets, remove the battery pack, then disconnect any interconnecting cables.

Avant de retirer une unité remplaçable en clientèle, mettez le système hors tension, débranchez tous les cordons d'alimentation des socles de prise de courant, retirez la batterie et déconnectez tous les cordons d'interface.

Die Stromzufuhr muß abgeschaltet, alle Stromkabel aus der Steckdose gezogen, der Akku entfernt und alle Verbindungskabel abgenommen sein, bevor eine FRU entfernt wird.

Prima di rimuovere qualsiasi FRU, spegnere il sistema, scollegare dalle prese elettriche tutti i cavi di alimentazione, rimuovere la batteria e poi scollegare i cavi di interconnessione.

Antes de quitar una FRU, apague el sistema, desenchufe todos los cables de las tomas de corriente eléctrica, quite la batería y, a continuación, desconecte cualquier cable de conexión entre dispositivos.

 Safety Notice 3

The battery pack contains small amounts of nickel. Do not disassemble it, throw it into fire or water, or short-circuit it. Dispose of the battery pack as required by local ordinances or regulations. Use only the battery in the appropriate parts listing when replacing the battery pack. Use of an incorrect battery can result in ignition or explosion of the battery.

La batterie contient du nickel. Ne la démontez pas, ne l'exposez ni au feu ni à l'eau. Ne la mettez pas en court-circuit. Pour la mettre au rebut, conformez-vous à la réglementation en vigueur. Lorsque vous remplacez la batterie, veillez à n'utiliser que les modèles cités dans la liste de pièces détachées adéquate. En effet, une batterie inappropriée risque de prendre feu ou d'exploser.

Akkus enthalten geringe Mengen von Nickel. Sie dürfen nicht zerlegt, wiederaufgeladen, kurzgeschlossen, oder Feuer oder Wasser ausgesetzt werden. Bei der Entsorgung die örtlichen Bestimmungen für Sondermüll beachten. Beim Ersetzen der Batterie nur Batterien des Typs verwenden, der in der Ersatzteilliste aufgeführt ist. Der Einsatz falscher Batterien kann zu Entzündung oder Explosion führen.

La batteria contiene piccole quantità di nichel. Non smontarla, gettarla nel fuoco o nell'acqua né cortocircuitarla. Smaltirla secondo la normativa in vigore (DPR 915/82, successive disposizioni e disposizioni locali). Quando si sostituisce la batteria, utilizzare soltanto i tipi inseriti nell'appropriato Catalogo parti. L'impiego di una batteria non adatta potrebbe determinare l'incendio o l'esplosione della batteria stessa.

Las baterías contienen pequeñas cantidades de níquel. No las desmonte, ni recargue, ni las eche al fuego o al agua ni las cortocircuite. Deséchelas tal como dispone la normativa local. Utilice sólo baterías que se encuentren en la lista de piezas al sustituir la batería. La utilización de una batería no apropiada puede provocar la ignición o explosión de la misma.

 Safety Notice 1

Before the computer is powered-on after FRU replacement, make sure all screws, springs, or other small parts are in place and are not left loose inside the computer. Verify this by shaking the computer and listening for rattling sounds. Metallic parts or metal flakes can cause electrical shorts.

Avant de remettre l'ordinateur sous tension après remplacement d'une unité en clientèle, vérifiez que tous les ressorts, vis et autres pièces sont bien en place et bien fixées. Pour ce faire, secouez l'unité et assurez-vous qu'aucun bruit suspect ne se produit. Des pièces métalliques ou des copeaux de métal pourraient causer un court-circuit.

Bevor nach einem FRU-Austausch der Computer wieder angeschlossen wird, muß sichergestellt werden, daß keine Schrauben, Federn oder andere Kleinteile fehlen oder im Gehäuse vergessen wurden. Der Computer muß geschüttelt und auf Klappergeräusche geprüft werden. Metallteile oder -splitter können Kurzschlüsse erzeugen.

Prima di accendere l'elaboratore dopo che é stata effettuata la sostituzione di una FRU, accertarsi che tutte le viti, le molle e tutte le altri parti di piccole dimensioni siano nella corretta posizione e non siano sparse all'interno dell'elaboratore. Verificare ci• scuotendo l'elaboratore e prestando attenzione ad eventuali rumori, eventuali parti o pezzetti metallici possono provocare cortocircuiti pericolosi.

Antes de encender el sistema despues de sustituir una FRU, compruebe que todos los tornillos, muelles y demás piezas pequeñas se encuentran en su sitio y no se encuentran sueltas dentro del sistema. Compruébelo agitando el sistema y escuchando los posibles ruidos que provocarían. Las piezas metálicas pueden causar cortocircuitos eléctricos.

To verify the symptom of the problem, power-on the computer using each of the power sources available as follows.

1. Remove the battery pack.
2. Connect the AC Adapter and check that power is supplied.
3. Disconnect the AC Adapter  and install the charged battery pack,  then check that power is supplied by battery pack.

If you suspect a power problem, see the appropriate power supply check listed below.

Two power management modes are provided by the computer to save power consumption and prolong battery power. For the details of the two modes, see the latest volume of the Hardware Maintenance Manual for ThinkPad computers.

Standby Mode: When in standby mode, the following occurs:

• The LCD backlight turns off.
• The hard disk motor stops.

Suspend Mode: When in suspend mode, the following occurs:

• The LCD power is powered-off.
• The hard disk is powered-off.
• The CPU is stopped.

Notes:

1. In the ThinkPad Features Program, the computer can be set to  'Will not suspend even if LCD is closed'.- When the computer is powered with ac power and is used  with one of the following IBM PC cards, the computer enters standby mode:, the PC card and application program  remain active.

   • 3270 Emulation Credit Card Adapter- 5250 Emulation Credit Card Adapter- Token-Ring 16/4 Credit Card Adapter- Credit Card Adapter for Ethernet

      - **During the following conditions,
         the **computer cannot enter suspend mode.****
     
        - While the communication link is running.- When a serial mouse or other pointing device are selected
             in the **Config** menu of Easy-Setup.
     

Symptom/Error	FRU/Action
Power shut down during operation.	1. Go to 'Power Systems Checkout' 2. Battery Pack 3. Remove the battery pack and let it cool for two hours. 4. Power Sources
The system will not power-off. See 'Reset Pushbutton'	1. Press the Reset pushbutton. 2. System Board

1. Power-off the computer and unplug the AC Adapter  from the computer.
2. Remove the backup battery.
3. Measure the voltage of the backup battery.

Wire	Voltage (Vdc)
Red	+2.9 to +3.3
Black	Ground

• If the voltage is correct, replace the system board.
• If the voltage is not correct, the backup battery has been  discharged. Replace the backup battery.
• If the backup battery discharges quickly after replacement,  replace the system board.

1. Power-off the computer.- Remove the battery pack and measure the voltage between battery  terminals 1 (+) and 4 (-).

   

   Voltage (Vdc) / Signal

   Terminal	340 (NiCd)	340CSE (NiMH)
   1	+10.0 to +18.0	+10.0 to +16.0
   2	NC	0 Ohm ground (-)
   3	10 KOhm ground (-)	10 KOhm ground (-)
   4	Ground (-)	Ground (-)

   • If the voltage is less than +10.0 Vdc, the battery pack has  been discharged or is defective.  Recharge the battery.  If the recharging does not work,  go to Step 5 to check the charging circuit.

   If the voltage is still less than +10.0 Vdc after the recharging,  replace the battery.- If the voltage is more than +8.0 Vdc,  measure the resistance between  battery terminals 3 and 4.  The resistance must be 4 to 30 kilohms.

      If the *resistance is not correct*, replace the battery pack.
   
      If the *resistance is correct*, replace the system board.
   
    - To check the charging circuit, do the following.
       Plug in the AC Adapter with the battery pack removed, then
       power-on the computer.- Measure the charging voltage between terminals
         1 (+) and 4 (-) on the computer.- If the voltage is less then +10.0 Vdc, replace
           the system board.
           If the voltage is more than +10.0 Vdc, the charging circuit is
           working correctly, replace the battery pack.
   

1040 IC DRAM Card

1050 Standby Battery

Step 2: Standby Battery

Step 3: IC DRAM Card

Step 4: Backup Battery

 
The IC DRAM card is sensitive to physical shock. Incorrect handling of the card can damage it.

NOTE: When removing the backup battery or standby battery, use the connector extractor ( P/N 39G9977 ).

You are here because the computer fails only when the AC Adapter is used. If the power-on indicator does not turn on, check the power cord of the AC Adapter for correct continuity and installation.

1. Unplug the AC Adapter cable from the computer and  measure the output voltage at the plug of the AC Adapter cable.

AC Adapter (30W, 40W):

Pin	Voltage (Vdc)
1	+17.1 to +18.9
2	Return

AC Adapter (35W):

Pin	Voltage (Vdc)
1	+15.5 to +17.0
2	Return

• If the voltage is correct, replace the system board. If the  problem is not corrected, go to 'Undetermined Problems'
• If the voltage is not correct, go to the next step.
• Unplug the AC Adapter cable from the ac power outlet and wait  five minutes or longer to allow the protection circuit  to be fully discharged and initialized.
• Plug the AC Adapter cable into the ac power outlet.
• Measure the output voltage of the AC Adapter.
• If the voltage is still not correct, replace the AC Adapter.

NOTE: An audible noise from the AC Adapter does not always indicate a defective adapter.

  Be careful not to cause a short circuit when measuring the voltage.

1. Power-off the computer and unplug the AC Adapter  from the computer.- Remove the standby battery.- Measure the voltage of the standby battery.

   • If the voltage between red and black  is 3.5 Vdc or greater, the voltage is  correct.  Go to Step 9  to verify standby battery operation.
   • If the voltage is less than 3.5 Vdc, go to the next step.

   • Plug the AC Adapter  into the computer and power-on the computer.- Measure the output voltage at the connector on the system board.

     

     Pin	Voltage (Vdc)
     +	+4.0
     -	Ground

     • If the voltage is less than +4.0 Vdc,  replace the system board.
     • If the voltage is more than +4.0 Vdc, power-off the computer,  replace the standby battery, and go to the next step.
     • Ensure that the AC Adapter is plugged into  the computer, then power-on the computer.
     • Charging of the standby battery starts.  A depleted battery needs approximately 30  minutes to be recharged to the operational voltage of +3.5 Vdc.
     • Unplug the AC Adapter.
     • Verify the standby battery function by removing and installing  the battery pack during suspend mode.

NOTE: Removing and installing the battery pack during suspend mode should be done within one minute.

The resume operation must start. If the resume operation does not work, switching of power from the battery pack to standby battery will not be correct. Replace the system board.

Use the ThinkPad Features program or PS2.EXE. to power-on the TV Tuner, then power-on the internal device in the diskette drive compartment.

  If power for the internal device is turned off when the TV Tuner is set up, nothing appears on the LCD display. Turn on power for the TV Tuner again.

• If you are using DOS, do one of the following:

• Power-on the computer and type PS2 from the  command prompt to start the ThinkPad Features program. Select Set Power Features from the ThinkPad Features  menu,then put a check mark at Internal Serial Port (or Diskette Drive Compartment )  under the Power for devices .  If you need help, press F1 to display the help menu.
• Type ps2 modem on from the command prompt,  press the Enter key to set the power ON.

• If you are using OS/2 or  Microsoft Windows, do the following:

  1. Power-on the computer and start the ThinkPad Features program.
  2. Select the Power icon, then move the pointer to Internal Serial Port (or Diskette Drive Compartment )  under the Power for devices and click the button to check mark it.
  3. Press the OK button.

Remove the external keyboard if the internal keyboard is to be tested.

If the internal keyboard does not work or an unexpected character appears, make sure that the three flexible cables extending from the keyboard are correctly seated in the connectors on the system board.

If the keyboard cable connection is correct, run the Keyboard Test by doing the following:

1. Go to advanced diagnostic menu screen  by pressing Ctrl+A in the basic diagnostic menu.
2. Press Ctrl+K , a layout of the keyboard  appears on the screen.
3. Check that when each key is pressed, the key position  on the keyboard layout on the screen changes to a black square.

NOTE:

• When a Fn key is pressed, a black square briefly appears.
• Press the Esc key to return to the diagnostic menu.

If the tests detect a keyboard problem, do the following one at a time to correct the problem.

Do not replace a non-defective FRU.

• Reseat the three cables.
• Replace the keyboard.
• Replace the system board.

The following auxiliary input devices are supported for this computer.

• Numeric keypad
• Mouse (PS/2 compatible)
• External keyboard (with keyboard/mouse cable)
• If any of the above devices do  not work, reseat the cable connector and repeat the failing operation.
• If the problem does not occur again, recheck the connector.
• If the problem is not corrected, replace the device, and then the  system board.

If the TrackPoint II or III will not work, check the configuration in Easy-Setup by selecting Keyboard from the Config menu. If the configuration of the TrackPoint II or III is disabled, select TrackPoint to enable it.

If this does not correct the TrackPoint II or III problem, continue with the following.

The TrackPoint II or IIIdoes automatic compensations to adjust the pointer sensor. During this process, the pointer moves on the screen automatically for a short time.**** This self-acting pointer movement can occur when a slight, steady pressure is applied to the TrackPoint II or III pointer while the computer is powered on or while the system is running, or re-adjustment is required because the temperature has exceeded its normal operating range. This symptom does not indicate a hardware problem. No service actions are necessary if the pointer movement stops in a short period of time.

If a click button problem or pointing stick problem occurs, do the following:

1. Go to the Easy-Setup screen.
2. Select an item with the pointing stick.
3. Press either the left or right click button.
4. Verify that both buttons work correctly.

If either the pointing stick or the click button will not work, do the following actions one at a time to correct the problem.

Do not replace a non-defective FRU.

• Reseat the three keyboard cables.
• Replace the keyboard.
• Replace the system board.

Do the following to isolate the problem to a controller, drive, or diskette. A scratch, write enabled, non-defective 2HD diskette is required.

NOTE: Make sure that the diskette does not have more than one label attached to it. Multiple labels can cause damage to the drive or can cause the drive to fail.

1. Do following to select the test device:

• Select the advanced diagnostic mode and  select Tool, then  select the icon FDD  and press the space key.  A OK mark appears next to the selected icon.  Insert the blank diskette when instructed.

• Run the diskette drive test.
• If the controller test detects an error, FRU code 10 appears.  Replace the system board.
• If the controller test runs without errors,  the drive read/write tests start automatically.
• If the drive test detects an error, FRU code 50 appears.  If the diskette itself is known to be good, replace the drive.

If no errors occur at the FDD position, the drive is not defective.

Symptom/Error	FRU/Action
Keyboard (one or more keys) does not work, or works intermittently.	1. Reseat the three keyboard cables. 2. Reseat the keytop. Ensure the rubber dome under the keytop is straight and in the correct direction, with the larger radius on the top. 3. Keyboard 4. System Board
TrackPoint II or III does not work.	1. Go to 'Trackpoint II and III Checkout' 2. Keyboard 3. System Board
Pointer moves automatically or does not work correctly.	1. See 'Trackpoint II and III Checkout'

Symptom/Error	FRU/Action
The system will not suspend or resume by opening or closing the keyboard.	1. Go to 'Suspend Mode' and check that the computer can enter suspend mode. 2. Go to the Easy-Setup screen and press Fn+4. If the computer enters suspend mode, suspect that the application program is defective. 3. System Board
The system will not suspend or resume by opening or closing the LCD.	1. Go to 'Suspend Mode' and that check that the computer can enter suspend mode. 2. Go to the Easy-Setup screen and press Fn+4. If the computer enters suspend mode, suspect that the application program is defective. 3. System Board
Battery Fuel-Gauge does not go higher than 90%.	1. Go to 'Checking the Battery Pack' and see the note.
Modem problems. (If installed)	1. Run the Internal Modem Test. 2. Check that the port is set to enable in Easy Setup. 3. Check that the port power is switched on by PS2.EXE. 4. Modem Card (if installed)
Memory count (size) appears differently from actual size.	1. Go to 'Memory Checkout'
System configuration does not match the installed devices.	1. Go to 'Checking the installed Devices List'
System hangs intermittently.	1. Go to 'Intermittent Problems'

The green LED on the PC test card turns on when the PCMCIA test is running. If the LED does not turn on, check that the card is installed correctly by reseating it. If the LED still does not turn on after the card is reseated, try using another slot for the test. If the LED still does not turn on and the test fails, replace the FRU shown in the diagnostic error code.

NOTE:

1. There are two keyboard latches on each side of the computer frame.  Slide the keyboard as shown in step 2 to release  the keyboard from those latches, them remove the keyboard.  (Small arrows on the both sides of the keyboard  show the locations of the latches.)
2. The keyboard has three cables, be careful not to damage  the cables when you open the keyboard and to remove them.

When Replacing

• Check that the three keyboard cables are clean, and  inserted straight and fully into the connectors.  Slide both ends of each connector latch at the same time  to make sure that each cable is correctly inserted.
• Go to 'Keyboard / Auxiliary Input Device Checkout' and test all keys before returning the  computer to the customer.

1110 Hard Disk Drive

Steps 1, 2, 3, 4: Diskette Drive

Steps 5, 6: Hard Disk Drive

When Replacing

• Before removing the hard disk drive,  have the user make a backup copy of all  information on the hard disk
• Never remove the hard disk drive while the system is operating  or is in suspend mode.
• Do not pull the hard disk cable The cable can be damaged if it is disconnected  without releasing the latch.
• Do not drop or apply any shock or extra force  to the hard disk drive or diskette drive.  They are sensitive to physical shock.

Use the following table for reference when replacing parts.

Step	Location (Quantity)	Length
1	Diskette Drive (2)	8 mm
5	Hard Disk Drive (2)	6 mm

NOTE: Make sure you use the correct screw. Screw Size Chart

If the display problem occurs only when using an external display, use the following instructions to correct the problem.

Note: Before you replace a display, check the following list to see if it is connected correctly.

• 8506 and 8508 displays must be connected to an Image Adapter/A or an  Image-I Adapter/A.
• 63XX and 85XX systems support either 63XX or 85XX displays.
• 85XX systems with an XGA-2 adapter support 95XX displays.
• 95XX systems support either 63XX, 85XX, or 95XX displays.
• ThinkPad models support either 85XX or 95XX displays.

If the screen is rolling, replace the display assembly. If that does not correct the problem, replace FRUs in the following order until the problem goes away:

1. Video card
2. Display adapter (any type)
3. System board
4. Bus adapter (if used)

If the screen is not rolling, run the display self-test as follows:

1. Power-off the computer and display.
2. Disconnect the display signal cable.
3. Power-on the display.
4. Set the contrast to its maximum position.
5. Set the brightness control to the center detent position.

Check for the following conditions:

• You should be able to vary the screen intensity by adjusting the contrast  and brightness controls.
• The screen should be white or light gray,  with a black margin (test margin) on the screen. NOTE: The location of the test margin varies with the type of display. The  test margin might be on the top, bottom, or one or both sides.

If you do not see a test margin on the screen, replace the display. If there is a test margin on the screen, replace the system board.

On ThinkPad Models 700, 700C, 720C, 720C, do the following:

1. Video card
2. System board

Use the following procedure to isolate the diskette problem to a controller, drive or diskette. A scratch, write-enabled 2HD diskette is required.

1. Select the icon FDD on the TEST MENU . By  doing this, the controller test and the drive  read/write test run.  If the controller test detects an error, FRU code 10 appears.  In this case, replace the system board.
2. If the controller test run without errors,  follow the instructions on the screen and insert a scratch  diskette.
3. If the drive test detects an error, FRU code 50 appears.  If the diskette media are known to be good, replace the drive or the  drive cable.

The following auxiliary input devices may be available for IBM ThinkPad models.

• Numeric keypad
• Mouse (PS/2 compatible)
• External keyboard (with Keyboard/Miniature Mouse cable)

• If you suspect a problem with any of the auxiliary input devices  (listed above), replace the device.

If the problem is not corrected, replace the following FRUs one  at a time to correct the problem.

• Keyboard control card
• System board

• If the computer receives an incorrect keyboard response,  remove other external devices, check the keyboard connections, and recheck  the keyboard responses. If the problem remains, replace the following FRUs  one at a time to correct the problem.

  • Keyboard
  • Keyboard control card
  • System board

  • If a 00030100 error message appears,  power-off the computer and the external devices.  Then power-on the computer before you power-on the external devices.

1. Make sure the printer is correctly connected and is powered-on.
2. Run the printer self-test.

If the printer self-test does not run correctly, the problem is in the printer. Refer to the printer service manual.

If the printer self-test runs correctly, do the following.

1. Verify the port settings in configuration.
2. Install a wrap plug on the port (indicated in configuration)  and run the advanced diagnostic tests.
3. If the advanced diagnostic tests (with the wrap plug installed)  do not detect a failure, replace the printer cable. If the problem is not corrected, replace the system board.

Use the following procedure to isolate a port replicator problem. A port replicator attaches to the system expansion connector at the rear of the computer.

1. Power-off the computer.- Remove the failing devices from the replicator.- Unplug the AC adapter from the replicator, if attached.- Remove the port replicator from the computer.- Reconnect the failing device directly to the computer.  (If another device occupies the connector, remove it first.)- Go to General Checkout and follow that procedure.- If the advanced diagnostic device test does not find an error,  suspect a problem with the port replicator  or the system expansion bus.- Power-off the computer and reconnect the port replicator.- Power-on the computer and run the following advanced diagnostic tests:

              - Serial port test with the wrap plug installed on the replicator.- Parallel port test with the wrap plug installed on the replicator.- PCMCIA-2 test with the PC test card installed.- FDD-2 (FDD-1 if no drive is installed in the computer)
                       drive test on the failing device.
   
              - If diagnostic errors appear, replace the replicator or diskette
                 drive attachment unit.
   
                 If the problem remains after the replacement, replace the
                 system board.
   
                - If power problems appear only when using the replicator, replace the
                   replicator.
   

If power shut downs occur intermittently when using PCMCIA-2 devices via a port replicator, suspect an over-current problem. Some PCMCIA devices use more power; if the maximum usage of each device occurs simultaneously, the total current will exceed the limit, thereby causing a power shut down. Isolate this problem by removing one of the devices, and use the computer under the same condition, and see whether a power shut down occurs. Do this procedure for all devices then determine the cause.

Customer purchase of the larger AC adapter (50W, optional) is recommended, if it is not yet in use.

• If the TrackPoint II  does not work, check the configuration.  If the configuration of the TrackPoint II is set to Disabled or Off, change it to Enable or On.

If the problem remains, continue.

NOTE: TrackPoint II automatically compensates to adjust  the pointer sensor. This causes the pointer to move slightly on  the screen and then stop. Pointer  movement might occur when  a slight, steady pressure is applied to the TrackPoint II pointer when  the computer is powered-on or running, or  when exceeded temperature range requires re-adjustment.

• If the cursor floats or moves erratically, power-off and disconnect the  mouse. Power-on the computer. If the  problem goes away, replace the mouse. If the problem remains, replace the  keyboard.- For click button or pointing stick problems:

  1. Go to the Easy-Setup screen.
  2. Select an item with the pointing stick.
  3. Press either left or right click button.
  4. Verify that both buttons work correctly.

  If the pointing stick or the click button does not work,  do the following.

  1. Reseat the keyboard cables.
  2. Replace the keyboard.
  3. Replace the interposer card (355x, 360x, 750x, 755x).
  4. Replace keyboard control card (720).
  5. Replace the system board.

The TV Tuner Pack (hereafter called TV Tuner) is an option for watching TV programs or videos on the IBM TFT color notebook computer. The computer changes to TV reception when the removable diskette drive is replaced with the TV Tuner.

The TV screen and normal computer display are easily switched by using the Hot key on the front panel of the TV Tuner.

Identifying Names and Functions

The following figure and table show the names and functions of each part of the TV Tuner.

Icons Functions

Connects the headphones.

Powered on and off the TV Tuner.

Switches between the TV screen and computer screen.

Increases the value such as the channel number.

Decreases the value such as the channel number.

Enters the mode to change the value of each function,

Switches the TV mode or external video mode.

Controls the speaker volume.

Connects the audio-in connector of the AV cable.

Connects video-in connector of the AV cable.

   Connects the active antenna unit or antenna cable.
 --------------------------------------------------------------

Using the Front Panel

The following table shows how to operate all functions of the TV Tuner with the controls on the front panel.

Key            Function
 Power

   Turns on the TV Tuner.
        This key is used only when the computer is turned on.
 Hot Key

   Switches computer display and TV screen.
Up

   Increases the value of parameters, Channel Number,
        Color, Tint, Brightness, Contrast, Auto Tuning Sensitivity,
        On-screen Message Selection.
 Down

   Decreases the value of parameters, Channel Number
        Color, Tint, Brightness, Contrast, Auto Tuning Sensitivity,
        On-screen Message Selection.
 Function

   Selects a function mode to adjust each function parameter.
        (See Using the Function Key)
 TV/Ext

   Switches the displayed video source between
        the receiving TV broadcast program and external devices such as
        VCR, video camera recorder, laser disk, and so on.

The system status indicators show the current computer status in different colors (green, yellow, and orange).

Symbol Color Meaning

Green Battery fully charged

  Orange               Diskette drive in-use

  Orange               Hard disk drive in-use

  Green                Keys in Num Lock mode

  Green                Keys in Caps Lock mode

  Green                Keys in Scroll Lock mode

  Green                Computer powered on

See the following table for the available memory size of each card.

IC DRAM	Memory size
0 MB	3712 KB
2 MB	5760 KB
4 MB	7808 KB
8 MB	11904 KB

Memory errors might stop system operations, show error messages on the screen, or hang the system.

Use the following procedure to isolate memory problems.

NOTE: Make sure that the memory card is fully installed into the connector. Loose connections can cause errors.

1. Power-off the computer and  remove the IC DRAM card from its slot (if installed).
2. Press and hold the F1 key; then power-on the computer.  Hold the F1 key down until the Easy-Setup screen appears.
3. Select Test and press enter.
4. Select Memory and press enter to  run the memory test on base memory. If an error appears, replace the  system board.
5. Power-off the computer and reinstall the IC DRAM card,  then power-on the computer.  Verify the memory size, then test the memory.  If an error appears, replace the IC DRAM card.

If memory problems occur intermittently, use the loop option to repeat the test. When the test detects an error, an error log is printed on the printer connected to the parallel port. See 'Error Log' for more information.

If a device is installed but the icon appears in a gray shade rather than a dark shade on the basic diagnostics screen, the device is defective. Reseat the device connectors. If the symptom remains, replace the device or the system board. If needed, adjust the contrast control to clearly distinguish the shades of the icon.

If a device that is not installed appears in a dark shade, do the following.

1. Replace the first device, such as a FDD, HDD, or PCMCIA.
2. If the problem remains, replace the system board.

PCMCIA, Parallel, and Serial icons are always displayed in dark shade, because the icons represent subsystems of the system board and not attachment of the devices.

Symptom/Error	FRU/Action
Flicker	1. Do not replace any FRUs. In certain brightness/contrast settings, screen flicker can be seen because of technical limitations.
No beep, power-on indicator on, and a blank LCD during POST.	1. System Board
° LCD backlight not working	1. Reseat the LCD connector.
° LCD too dark ° LCD brightness cannot be adjusted ° LCD contrast cannot be adjusted.	See '1090 LCD Assembly' 2. LCD Assembly
° LCD screen unreadable, or	1. Reseat the LCD connector.
° Characters missing pels, or ° Screen abnormal, or ° Wrong characters displayed.	See '1090 LCD Assembly' 2. System Board 3. LCD Assembly
LCD has extra horizontal or vertical lines displayed.	1. LCD Assembly

LCD FRU Replacement Notice:If missing or discolored dots appear on the LCD,carefully read the following note to determine whether you should replace the LCD.

• Do not replace the LCD for defective pixels if dots that are  less than half the area of a pixel are defective  (a total of 11 dots are allowed).
• The LCD is not defective if the dots are functional but are  slightly different in color from  the immediate, surrounding area or appear as a stain

Symptom/Error	FRU/Action
Indicator incorrectly remains off or on, but system runs correctly.	1. Reseat the indicator card. 2. Indicator Card 3. System Board
Battery power status indicator blinks from green, yellow, to orange	1. Check that a correct battery is installed. 2. Battery Pack 3. System Board

Symptom/Error	FRU/Action
External display does not work correctly.	1. See 'External Display Self Test' in the 'Common Devices Checkout' section.
Printer problems.	1. Run Printer Self-test 2. System Board 3. Parallel Port Device
Serial or parallel port device problems.	1. Device 2. Device Cable 3. System Board

Symptom/Error	FRU/Action
PCMCIA slot pin is damaged.	1. System Board

NOTE: If you cannot find a symptom or error in this list and the problem remains, see 'Undetermined Problems'

You are here because the diagnostic tests did not identify which adapter or device failed, installed devices are incorrect, a short circuit is suspected, or the system is inoperative. Follow the procedures below to isolate the failing FRU (do not isolate non-defective FRUs).

Verify that all attached devices are supported by the computer.

Verify that the power supply being used at the time of the failure is operating correctly. 'Power Systems Checkout'

1. Power-off the computer.- Check the cables, wires, and connectors for  short circuits and open circuits. Visually check them for damage.  If any problems are found, replace the FRU.- Remove or disconnect all of the following devices.

   1. Non-IBM devices- Devices attached to the expansion bus connector- Printer, mouse, and other external devices- Battery pack- IC DRAM card- PC cards

              **NOTE:** Remember that removing the hard disk drive, an IC DRAM card,
               or any adapter or device, might cause configuration errors.
              ****Ignore error code 174.****
      

   • Power-on the computer.
   • Determine if the problem has changed.
   • If the problem does not occur again,  reconnect the removed devices one  at a time until you find the failing FRU.
   • If the problem remains, replace the following FRUs one at a time. Do not replace a non-defective FRU.

• Modem card (if installed)
• LCD assembly
• System board

Diagnostic errors are printed on the printer that is attached to the parallel port when the error is detected. The error is also logged in the system memory.

Do the following to display the errors.

1. End the test, if it is running.
2. Press Ctrl+A to select the advanced diagnostic mode.
3. Press Ctrl+E .
4. The error log appears.
5. To exit the screen, select the cancel icon or press Esc.

The error log is not saved when system power is powered-off.

Do the following to format the hard disk.

  Before Formatting the Hard Disk

Make sure that the address of the drive to be formatted is correct. This procedure will erase all information on the disk.

1. Power-off the computer.- Insert the ThinkPad 750Ce hardware maintenance diskette  into diskette drive A and power-on the computer.

   NOTE: You can use this maintenance diskette for the Model 340CSE.

   • Select Format the hard disk from the main menu.
   • Select the drive from the menu.
   • Follow the instructions on the screen.

The following table shows the Fn key and function key combinations and their corresponding functions.

The Fn key works independently from the operating system. The operating system obtains the status through the system management interface to control the system.

Fn +	Description
F1	Reserved
F2	Fuel-gauge display ON/OFF
F3	Standby mode invocation
F4	Suspend mode invocation
F5	Audio volume Down
F6	Audio volume UP
F7	LCD/CRT display switching
F8	LCD normal/reverse switching
F9	Reserved
F10	Reserved
F11	Power management mode switching (Toggles High power, Medium, Low)
F12	Reserved

When Replacing Be careful to not break the pins of the indicator card connector.

1 Resume/Suspend Switch

2 Power Switch

3 System board Interface

Each time you press the Function key  
one of the following messages (called On-Screen Message) appears at the top left corner of the LCD.

The changed values are automatically saved when you return to the TV Channel On-Screen message. The values are not saved when you power-off the TV Tuner without returning to this message.

Message on       Parameter
 LCD
                   TV Channel
  (xx)             By using <- and +>  you can select the channels
                   from 2 to 69.
                   Color Adjustment
   COL             By pressing and holding <- or +>
                   you can change the color.
                   TINT Adjustment
   TNT             By pressing and holding <- or +>
                   you can change the tint.
                   Bright Adjustment
   BRT             By pressing and holding <- or +>
                   you can change the brightness.
                   Contrast Adjustment
   CNT             By pressing and holding <- or +>
                   you can change the contrast.
   ---             (No function)
                    Reserved.
                   Auto Tune Sensitivity Selection
    LO             LO: Means the sensitivity
                   of the TV is low.  In this mode, the TV Tuner receives
                   strong TV signals only.  To set LO,
                   press <-
    HI             HI: Means the sensitivity
                   of the TV is high (factory default).
                   In this mode, the TV Tuner receives weak and strong TV signals.
                   To set HI, press +>
    D3S            Time On-Screen Message appears
                   D3S: On-screen Message appears for 3 seconds.
                   To set D3S, press <-
    DON            DON: On-screen Message always appears.
                   To set DON press +>

The following table shows what to do to solve problems when the TV Tuner does not work correctly.

Problem        Probable Cause
 The TV Tuner        ° Computer is not powered on.
 does not operate.   ° Computer is in suspend mode.
  (No picture        ° Volume control of the TV Tuner or computer
   or sound)           is not adjusted correctly.
                     ° The power for the TV Tuner is not supplied.
                       (See Power-on the TV Tuner)
                     ° The wall outlet from the outdoor antenna is not active.
                     ° The video or antenna cable is not connected correctly.
                     ° Antenna elements of the active antenna unit are not adjusted.
                     ° The batteries in the active antenna unit are not inserted
                       correctly.
                     ° The batteries in the active antenna unit are depleted.
                     ° The TV Tuner is not set up correctly.
                     ° You cannot watch TV or videos on the external display.
                     ° LO is set for the auto tune sensitivity
                       selection.
 No color.           ° The program is not in color.

Snow and noise      ° Switch the TV/EXT (  ) button.
 only.
 Pictures are out    For TV:
 of shape, or have   ° The channel is not tuned correctly.
 double images.      ° Adjust the antenna.
                     For VCR:
                     ° Change the tracking adjustment.
 Dotted lines        ° Usually caused by interference from
 or stripes.           neon signs, hair dryers, and so on.
                       Move the computer to avoid the interference.
 Picture control     ° Do not power-off the TV Tuner
 are not saved.        when adjusting functions such as picture control,
                       color, tint, brightness, or contrast.
 Channel number is   ° Select your favorite mode for the on-screen message.
 always displayed or
 is not displayed.

System Programs in Flash Memory

System setup programs and diagnostic tests are stored in Flash memory.

Flash Memory Update A flash memory update is required for the following conditions:

• Connecting the AC Adapter, and installing the charged battery pack in the computer.
• New versions of system programs.
• New features or options are added.

To update the flash memory, do the following.

1. Get the appropriate diskette which contains the update.
2. Insert the System Program Service Diskette into drive A and power-on the computer.
3. Select Update system programs from the menu.

The processing functions for the computer are performed by the system board. When a numeric code calls out the system board, use the following procedure to isolate the problem.

1. Run the system board test to verify the symptom. This test verifies  the system board.  If no error is detected, return to 'General Checkout'
2. If FRU code 10 appears, replace the system board.
3. Rerun the test to verify the fix.

If above procedure does not correct the problem, go to 'Undetermined Problems'

The reset pushbutton resets the system and forces the power to be powered-off .

NOTE: Use this pushbutton when the power is not completely off or the system is hung. See 'System Board' for the location of the pushbutton.

Remove the rear connector door by flexing it.

Step	Location (Quantity)	Length
1	Base cover (3)	12 mm

NOTE: Make sure you use the correct screw. Screw Size Chart

  If theLCD breaks and the fluid from inside the LCD
gets into your eyes or on your hands, immediately wash the affected areas with water for at least 15 minutes. Seek medical care if any symptoms from the fluid are present after washing.

Caring for the LCD

• When cleaning of the LCD becomes necessary,  gently wipe the LCD with a dry, soft cloth.  Do not use alcohol or detergent to clean the LCD.
• To avoid damage to the LCD,  do not scratch or apply any force to its surface.
• Do not put anything on the surface of the LCD.
• Do not pull the LCD cable. The cable can be damaged if it is disconnected  without releasing the latch.

Use the following table for reference when replacing parts.

Step	Location (Quantity)	Length
1	LCD cable (1)	6 mm
3	LCD hinge (4)	8 mm

NOTE: Make sure you use the correct screw. Screw Size Chart

1 External Display Connector

2 Serial Connector

3 PCMCIA Slot

4 Serial Connector

5 Reset Pushbutton

6 Power Jack

7 External Input Device connector

1 Backup Battery

2 IC DRAM Card Slot

3 Standby Battery

4 Battery Pack

1 Internal Modem Card connector

(Modem model only)

2 External Display Connector

3 Parallel Connector

4 LCD connectors

5 PCMCIA Slot

6 Indicator Card Connector

7 Reset Pushbutton

8 LCD Inverter Power Connector (340CSE)

9 Serial Connector

10 Power Jack

11 External Input Device Connector

12 Keyboard Signal Connector

13 Hard Disk Drive Connector

14 Speaker Connector (340CSE only)

15 Keyboard TrackPoint II/III Connector

16 Battery Pack Terminal

17 POP Terminal

18 Standby Battery Connector

19 IC DRAM Card Connector

20 Diskette Drive Interface

21 Backup Battery Connector

Use the chart to match the size and shape of the screws in the computer you are servicing.