Chapter 3. ThinkPad X20, X21, X22,
X23, X24
Product overview ............42
Specifications ............42
Statusindicators...........45
Fn key combinations ..........47
Symptom-to-FRU index ..........48
Numeric error codes ..........48
Error messages ...........50
Beep symptoms ...........51
No beep symptoms .........51
LCD-related symptoms .........52
Intermittentproblems..........52
Undetermined problems .........53
FRU replacement notices .........54
Screwnotices............54
Retaining serial numbers.........55
Restoring the serial number of the system unit 55
RetainingtheUUID.........56
Removing and replacing a FRU........57
1010 Battery pack...........58
1020 DIMM ............59
1030 Backup battery ..........60
1040 Hard disk drive ..........61
1050 Keyboard ...........63
For X20, X21 ...........63
For X22, X23, X24 .........65
1060 KBD Control Panel Assemble .....67
1070 Mini PCI adapter .........69
For X20, X21 ...........69
For X22, X23, X24 .........69
1080 CDC adapter ..........70
For X22, X23, X24 .........71
1090 BDC adapter ..........71
For X23, X24 ...........72
1100 Fan assembly ..........72
For X20, X21 ...........72
For X22, X23 ...........73
ForX24.............73
1110 Wirelesslan assembly for X22, X23, X24 . . 74
1120 LCD assembly ..........75
For X20, X21 ...........76
For X22, X23, X24 .........78
1130 Case Keyboard deck ........79
For X20, X21 ...........80
For X22, X23, X24 .........81
1140 Speaker ............82
For X20, X21 ...........82
For X22, X23, X24 .........83
1150 PC Card slot assembly .......84
For X20, X21 ...........84
39