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General descriptions
The descriptions in this chapter apply to any ThinkPad model that has the
PC-Doctor
®
for DOS diagnostics program. Some descriptions might not apply to
your particular computer.
Read this first
Before you go to the checkout guide, be sure to read this section.
Important notes
v Only certified trained personnel should service the computer.
v Before replacing any FRU, read the entire page on removing and
replacing FRUs.
v When you replace FRUs, use new nylon-coated screws.
v Be extremely careful during such write operations as copying, saving, or
formatting. Drives in the computer that you are servicing sequence might
have been altered. If you select an incorrect drive, data or programs might
be overwritten.
v Replace a FRU only with another FRU of the correct model. When you
replace a FRU, make sure that the model of the machine and the FRU part
number are correct by referring to the FRU parts list.
v A FRU 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. Consider replacing a FRU only when a
problem recurs. If you suspect that a FRU is defective, clear the error log
and run the test again. If the error does not recur, do not replace the FRU.
v Be careful not to replace a nondefective FRU.
What to do first
When you do return a FRU, you must include the following information in the
parts exchange form or parts return form that you attach to it:
__ 1. Name and phone number of servicer
__ 2. Date of service
__ 3. Date on which the machine failed
__ 4. Date of purchase
__ 5. Failure symptoms, error codes appearing on the display, and beep
symptoms
__ 6. Procedure index and page number in which the 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
Note for warranty:
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.
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