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Service Hints & Tips |
Document ID: DJON-3LVNMP |
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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. |
TP 770 - Read this first
Applicable to: World-Wide
Before you go to the Checkout Guide, be sure to read this document.
Important Notes:
- Only certified trained personnel should service the computer.
- Read FRU service procedures before replacing any FRUs.
- Be extremely careful during write operations (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 might be overwritten.
- Replace FRUs only for the correct model. When you replace a FRU, make sure the model of the machine and FRU part number are correct by referring to the parts list. FRUs should not be replaced because of a single, unreproducible failure. Single failures can occur for 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 be considered only 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 nondefective 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 cause subsequent error codes to be false. 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 Common Devices Checkout.
How to Diagnose Multiple FRUs: If the adapter or device has more than one FRU, the error code could be caused by any one of them. 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: 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, BIOS level, and serial number
9. Customer's name and address
Before checking problems with the computer, determine whether the damage is covered under the warranty by referring to the following:
Note for Warranty:
1. Check the ECAs (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, accident, modification, unsuitable physical or operating environment, or improper maintenance by the customer. The
following list provides some common items that are not covered under warranty and some symptoms that may indicate that the system was subjected to stresses beyond normal use:
The following is not covered under warranty:
- LCD panel cracked from the application of excessive forces, shock, or from 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 improper insertion of a PCMCIA Card or the installation of an incompatible card
- Damage caused by foreign material in the diskette drive or UltraBay II
- Diskette drive damage caused by the diskette drive cover being pressed or by the insertion of diskettes with multiple labels
- Damaged or bent diskette eject button
- CD-ROM drive damage caused by excessive force, by shock, or by being dropped
- Fuses blown by the attachment of a nonsupported device
- Forgotten computer or hard disk password (making the computer or hard disk unusable)
If the following symptoms are present, they may indicate damage caused by nonwarranted activity:
- Missing parts might be a symptom of unauthorized service or modification.
- HDD spindles can become noisy from being subjected to excessive force or from being dropped.
- I9990303 errors can be caused by exposure to strong magnetic fields.
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Hint Category |
Hardware Maintenance Information | |
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Date Created |
13-09-97 | |
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Last Updated |
01-05-98 | |
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Revision Date |
28-04-99 | |
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Brand |
IBM ThinkPad | |
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Product Family |
ThinkPad 770 | |
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Machine Type |
9548, 9549 | |
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Model |
All | |
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TypeModel |
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