ThinkPad X20, X21, X22, X23

Chapter 3. ThinkPad X20, X21, X22, X23, X24

Product overview	.	42
Specifications	.	42
Status indicators	.	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
Intermittent problems	.	52
Undetermined problems	.	53
FRU replacement notices	.	54
Screw notices	.	54
Retaining serial numbers	.	55
Restoring the serial number of the system unit		55
Retaining the UUID	.	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
For X24	.	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