ThinkPad 300

2 variants of this machine type, side by side. A cell spanning several columns is shared by those models, so the narrow cells are the differences — memory type, battery chemistry and panel are what usually change across a range.

IBM model codes — 1 model of machine type 2615

Variant	Model codes
ThinkPad 300	2615-ALL

Light State Status Indicated

 
             Green              Battery pack is full.
             Amber              Battery pack is being fast charged.
             Amber (flashing)   Battery pack temperature is out of operational range.
             Red                Problem in battery circuit.
             Off                Computer is operating from battery pack.
                                Battery pack is removed from computer.
                                Computer is off.
                                Computer is using external power (car battery or AC power).
 ------------------------------------------------------------------------------------------  

 
On Computer is attached to AC power

 
On Standby mode is active

 
On Computer is operating from battery

 
On Hard disk drive is active

 
On Diskette drive is active

 
On Port replicator is attached

 
On External video is enabled

 
On Modem is enabled

 
On LAN controller is enabled

 
On Speaker is enabled

 
On Keyboard is in Num Lock mode

 
On Keyboard is in Caps Lock mode

 
On Keyboard is in Scroll Lock mode

 
On Imbedded keypad is locked on

The ThinkPad 300 was one of the very first ThinkPad models, manufactured by Zenith Data Systems for IBM.

  The diagnostic tests are intended to test only IBM products. Non-IBM products, prototype card, or modified options can give false errors and invalid computer responses.

1. Power-off the computer and all external devices.
2. Insert the Advanced Diagnostics diskette into the diskette drive.
3. Power-on all external devices, then power-on the computer.
4. Press Ctrl+Alt+Ins to start the Monitor program.
5. At the Monitor-program prompt, type BF then press Enter.
6. Follow the instructions on the screen and run the diagnostics tests. For information on how to disable a password, see 'Power-on Password'

NOTE: Press F1 to access the help screens.

• If you receive an error or message, find your symptom below, then go to the appropriate page.

  For information about how to run diagnostics, passwords, and various other tests, go to 'Related Service Procedures'.

1. Power-off the computer and all external devices.
2. Insert the Advanced Diagnostics diskette into diskette drive.
3. Power-on all external devices, then power-on the computer.
4. Press Ctrl+Alt+Ins to start the Monitor program.
5. At the Monitor-program prompt, type BF then press Enter .
6. Follow the instructions on the screen and run the diagnostics  tests.

NOTE: Press F1 to access the help screens.

The PREP utility initializes and prepares the hard disk surface for the storage of data. It performs a low-level format, then checks for bad sectors. If any bad sectors are found, they are marked in a way that prevents data from being stored in them.

There are two situations where PREP is used.

• To prepare the hard disk drive surface for formatting when  installing a new hard disk drive.
• To exclude sectors of the hard disk that have become  unusable, indicated by intermittent or continuous hard  disk drive read failures.

  PREP erases all data on the hard disk.

If at all possible, always back up the data on the hard disk to diskettes before running PREP.

The Symptom-to-FRU Index lists symptoms, errors, and the possible causes. The most likely cause is listed first. Use this index to help you decide which FRUs to have available when servicing the computer.

NOTE: For IBM devices not supported by the ThinkPad 300 diagnostic code, refer to the manual for that device.

For Error Codes see Numeric Error Codes

Whenever a diagnostic test fails, an error message is displayed indicating what device failed. The following table cross references a failed device message to the failing FRU.

  FRU Removals and Replacements

Follow the numerical sequence in the FRU removal sequence list and in the exploded view to remove or disconnect parts in the correct order. The letters in parentheses in the list indicate screw types. See the 'Screw Sice Chart' to match the letters to the correct screw type and size before replacing each screw.

  **Safety 8

Safety 1**

1. Battery Pack

   • Coprocessor Cover
   • Three Top Cover Screws (1-B, 2-TT)

   (At rear of keyboard)

   • Five Bottom Cover Screws (4-B, 1-UU)
   (One is inside battery compartment)
   • LCD Cable
   • LCD Ribbon Cable
   • LCD Assembly
   • One Keyboard Screw (D)   (At front of keyboard)
   • Two Ribbon Cables
   • Keyboard Assembly
   • Four System Board Screws (D)
   • Two Threaded Hex Spacers   (At rear of system board)
   • System Board
   • Three Hard Disk Drive Screws (D)
   • Hard Disk Drive and Mounting Brackets   (Have customer backup all information before replacing drive. Do   not replace the hard drive if the computer is operating or is in suspend   mode. Restore drive system information using the customer's backup   copy of the system programs.)
   • Diskette Drive Ribbon Cable
   • Diskette Drive
   • Backup Battery
   • Speaker
   • Five Threaded Spacers
   • Video/Power Board

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Back to

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

1. Serial Connector
2. Parallel Connector
3. Port Replicator Connector
4. Memory Module Connectors
5. Math Coprocessor Connector
6. Keyboard Connector
7. Status Light Panel Connector
8. AC Adapter Connector
9. External Display Connector
10. LAN Connector
11. LCD Connectors
12. System Board Connectors
13. Modem Connector
14. Diskette Connector
15. Speaker Connector
16. Backup Battery Connector
17. Hard Disk Drive Connector
18. Battery Contacts

  Power-On Password

To override a password, do the following.

1. Power-off the computer.
2. Remove the access panel.
3. Remove the battery pack.
4. Remove the top assembly (do not disconnect any cables).
5. Connect a jumper to the two pads (R39) at the side of  the math coprocessor socket.
6. Reinstall the battery pack.
7. Power-on the computer. Keep the computer on until the LEDs blink and  the system locks.
8. Remove the jumper.
9. Press and hold the reset switch, then power-on  the computer.
10. Power-off the computer.
11. Replace the top assembly and the access panel.

To use the advanced utilities, select Advanced Utilities from the Run Tests menu. Use the arrow keys to move the highlight to the proper utility. Instructions are provided on the screens when the utilities are selected.

Read LAN ID

Select this field to read the current LAN ID number that is programmed into the main board.

Set LAN ID

Select this field to program a new LAN ID number into the main board.

Set EEPROM

Select this field to program the EEPROM. It allows you to set LCD display type (monochrome or color) and enable or disable the LAN option, if installed.

Use this procedure to reprogram the computer's BIOS. The computer contains the latest version of BIOS available when manufactured, but later revisions might be available. There are two reasons for replacing the BIOS.

1. To have a more recent version of BIOS that adds features  that enhance the computer's performance.
2. To reinstall the BIOS on a computer in which the BIOS  has become corrupt.

After you select this option, the current BIOS version will be displayed. You will be asked if you want to overwrite the current BIOS version. If you answer Yes, the computer will look for the BIOS image file on drive A and install it.

NOTE: Always operate the computer on AC power when updating the BIOS.

 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 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.