Lenovo ThinkPad X20 ThinkPad X20, X21, X22, X23, X24 Hardware Maintenance Manu - Page 25

General descriptions, Read this first

Get Lenovo ThinkPad X20 PDF manuals and user guides View all Lenovo ThinkPad X20 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 25 highlights

Chapter 2. 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: v Only certified trained personnel should service the computer. v Read the entire FRU removal and replacement page before replacing any FRU. v Use new nylon-coated screws when you replace FRUs. v Be extremely careful during such write operations as copying, saving, or formatting. Drives in the computer that you are servicing may have had their start sequence altered. If you select an incorrect drive, data or programs might be overwritten. v 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. 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 reoccurs. 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. v Service applied by an unauthorized/trained Thinkpad technician may potentially void your warranty 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 21

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
Chapter 2. 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:
v
Only certified trained personnel should service the
computer.
v
Read the entire FRU removal and replacement page
before replacing any FRU.
v
Use new nylon-coated screws when you replace
FRUs.
v
Be extremely careful during such write operations
as copying, saving, or formatting.
Drives in the
computer that you are servicing may have had their start
sequence altered. If you select an incorrect drive, data
or programs might be overwritten.
v
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.
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 reoccurs. 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.
v
Service applied by an unauthorized/trained Thinkpad
technician may potentially void your warranty
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
21