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Service Hints & Tips

Document ID: GKEY-3JKGWQ

TP 765D/L - Read This First

Applicable to: World-Wide

Read This First:

Before you go to the checkout guide, be sure to read this section.

Important Notes:

Only certified trained personnel should service the computer. Read FRU service procedures before replacing any FRUs. Be extremely careful during write operations such as copying, saving, or formatting. Drives in the computer that you are servicing might have been rearranged or the drive startup sequence might have been altered. If you select an incorrect drive, data or programs can be written over. Replace FRUs only for the correct model. When you replace the FRU, make sure the model of the machine and FRU part number are correct by referring to the part list. FRUs should not be replaced because of a single, un-reproducible failure. Single failures can occur from a variety of reasons that have nothing to do with a hardware defect such as: cosmic radiation, electrostatic discharge, or software errors. FRU replacement should only be considered when a recurring problem exists. If this is suspected, clear the error log and run the test again. Do not replace any FRUs if log errors do not reappear. Be careful not to replace a non-defective FRU.

How to Use Error Messages:
Use the error codes displayed on the screen to diagnose failures. If more than one error code is displayed, begin the diagnosis with the first error code. The cause of the first error code can result in false error codes being displayed. If no error code is displayed, see if the error symptom is listed in the 'Symptom-to-FRU Index—.

Port Replicator Problems:
If you suspect a problem with the Port Replicator, see 'Port Replicator Checkout—.

How to Diagnose Multiple FRUs:
When the adapter or device has more than one FRU, the error code could be caused by either FRU. Before replacing multiple FRUs, try removing or exchanging each FRU, one by one in the designated sequence, to see if the symptoms change.

What to Do First:
The servicer must include the following in the parts exchange form or parts return form that is attached to the returned FRU.
1. Name and phone number of servicer.
2. Date of service.
3. Date when part failed.
4. Date of purchase.
5. Failure symptoms, error codes appearing on display, and beep symptoms.
6. Procedure index and page number in which failing FRU was detected.
7. Failing FRU name and part number.
8. Machine type, model number, and serial number.
9. Customer's name and address.

Before checking problems with the computer, determine whether or not the damage applies the warranty by referring to the following:

Warranty Note:
1. Check the ECA's (Engineering Change Announcements) of the device that pertain to the system failure before billing the customer.

2. During the warranty period, the customer may be responsible for repair costs if the computer damage was caused by misuse, modification, unsuitable physical or operating environment, or improper maintance by the customer

The following list provides some common items that are not covered under warranty and some symptoms that may indicate the system was subjected to stresses beyond normal use:

LCD panel cracked by applying excessive force or by being dropped.
Scratched (cosmetic) parts.
Cracked or broken plastic parts, broken latches, broken pins, or broken connectors caused by excessive force.
Damage caused by liquid spilled into the system.
Damage caused by improperly inserting a PCMCIA card or installation of an incompatible card.
Damage caused by foreign material in the FDD or UltraBay.
Diskette drive damage caused by pressing the diskette drive cover or inserting diskettes with multiple labels.
Damaged or bent diskette eject button.
CD-ROM drive damage caused by excessive forces shock, or by being dropped
Fuses blown by attaching a non-supported device.
Forgotten computer password (making the computer or hard disk unusable)

If the following symptoms are present, they may indicate damage caused by non-warranted activity:
Missing parts may be a symptom of unauthorized service or modification.
HDD spindles can become noisy if subjected to excessive force or by being dropped.
I9990303 errors can be caused by exposure to strong magnetic fields.

How to Disable the Power-On Password:

1.	Power off the computer.
2.	Open the keyboard, and remove the diskette or CD - ROM drive.
3.	Install a jumper on the power-on password connector on the left side of the FDD connector.
4.	Reinstall the battery pack and the diskette/CD-ROM drive.
5.	Power on the computer and wait until the POST ends.
6.	Verify that the password prompt does not appear.
7.	After the service check is completed, remove the jumper.

To reactivate the password, set the password again.

Supervisor and Hard Disk Passwords

The supervisor password and the hard disk password (HDP) are security features that are used to protect the
system and the hard disk data from unauthorized access. No overriding capability is provided. If only a hard disk
password is set, obtaining permission from the password owner to unlock the password is a prerequisite for running
diagnostic tests and performing service. If both supervisor password and hard disk password are set, you can enter
Easy-Setup by pressing the Enter key or power-on password at the supervisor password prompt.
In this case, the Password, Start up , and Initialize icons cannot be selected.

See "Password Combinations") for more information about passwords.

Note:
	The supervisor password and hard disk password cannot be replaced If they are forgotten. If the customer forgets the supervisor password, the system board must be replaced. If the customer forgets the hard disk password, the hard disk drive must be replaced.

Power Shutdown Switch

The power shutdown switch resets the system regardless of the microcode status and forces the power off.
Use this push button to power-off when power is not completely off or the microcode is in a hung state.

See "Rear View" for the power shutdown switch.

	Search Keywords
	Hint Category	Hardware Maintenance Information
	Date Created	01-07-97
	Last Updated	19-08-98
	Revision Date	18-08-99
	Brand	IBM ThinkPad
	Product Family	ThinkPad 765L, ThinkPad 765D
	Machine Type	9546, 9547
	Model	Various
	TypeModel
	Retain Tip (if applicable)
	Reverse Doclinks and Admin Purposes