Lenovo ThinkPad 570E English - Hardware Maintenance Manual for 570 systems - Page 23

General descriptions, Read this first

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Read this first General descriptions This chapter includes descriptions for any ThinkPad model that has the PC-Doctor 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 Only certified trained personnel should service the computer. Read the entire FRU removal and replacement page before replacing any FRU. Use new nylon-coated screws when you replace FRUs. Be extremely careful during such write operations 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 might be overwritten. Replace FRUs only for the correct model. When you replace a FRU, make sure the model of the machine and the FRU part number are correct by referring to the FRU parts list. 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 suspected that a FRU is defective, 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. 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  Copyright IBM Corp. 2000 19

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Read this first
General descriptions
This chapter includes descriptions for any ThinkPad model
that has the PC-Doctor 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
±
Only certified trained personnel should
service the computer
.
±
Read the entire FRU removal and replacement
page before replacing any FRU
.
±
Use new nylon-coated screws when you
replace FRUs
.
±
Be extremely careful during such write
operations 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 might be
overwritten.
±
Replace FRUs only for the correct model.
When you replace a FRU, make sure the model
of the machine and the FRU part number are
correct by referring to the FRU parts list.
±
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 suspected that a
FRU is defective, 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.
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
Copyright IBM Corp. 2000
19