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Service Hints & Tips |
Document ID: GSMH-3C7EK9 |
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This document is provided to IBM and our Business Partners to help sell and/or service IBM products. It is not to be distributed beyond that audience or used for any other purpose. |
Laptop L40SX - Related Service Procedure
Applicable to: World-Wide
Related Service Procedures:
Checking Installed Devices:
The Installed Devices List shows the presence of devices in the computer. If an adapter or device is missing from the list, you might have one of the following conditions.
- An adapter or device is defective.
- The device missing from the list is an unrecognizable drive or adapter.
- The device missing from the list requires an additional diskette. (See the device service manual.
- A power supply voltage is incorrect (see ¿Power Systems Checkout—).
If the adapter is on the list, run the adapter diagnostics tests. If the list contains an adapter or device that is not installed, go to ¿Undetermined Problem—.
Power-on Password:
To service a computer with an active, unknown, power-on password, do the following.
1. Power-off the computer and unplug the power cord.
2. Remove the system-unit cover.
3. Move the password jumper J23 to connect the center pin and the pin on the opposite end of the connector.
4. Power-on the computer to erase the password. There is no need to move the jumper back to the previous position.
How to Run Advanced Diagnostics:
1. Power-off the computer.
2. Insert the backup copy of the Reference Diskette into the diskette drive.
3. Power-on the computer.
4. Advance to the Main Menu.
5. Press Ctrl+A to run the System Checkout.
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Hint Category |
Hardware Maintenance Information | |
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Date Created |
09-12-96 | |
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Last Updated |
15-04-98 | |
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Revision Date |
02-04-99 | |
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Brand |
IBM ThinkPad | |
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Product Family |
Laptop L40 | |
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Machine Type |
8540, 8543 | |
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Model |
Various | |
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TypeModel |
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Retain Tip (if applicable) |
N/A | |
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