IBM 2621421 Hardware Maintenance Manual - Page 133

Keyboard/TrackPoint-Related Symptoms, LCD-Related Symptoms, Go to Keyboard and External

Get IBM 2621421 - ThinkPad i Series 1400 2621 PDF manuals and user guides View all IBM 2621421 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 133 highlights

Symptom/Error No beep, power-on indicator turns on and LCD is blank. But you can see POST on an external CRT. No beep, power-on indicator turns on and a blinking cursor shown on LCD during POST. No beep during POST but system runs correctly. FRU/Action in Sequence Reconnect the LCD connectors. LCD inverter ID LCD LVDS board (for 14.1-inch LCD) LCD FPC cable LCD inverter LCD System board Ensure every connector is connected tightly and correctly. System board Adjust the audio volume control. Speaker connector System board Note: The buzzer is on the system board. Keyboard/TrackPoint-Related Symptoms Symptom/Error Keyboard (one or more keys) doesn't work. TrackPoint does not work. FRU/Action in Sequence Go to "Keyboard and External Input Device Check" on page 114. Reconnect keyboard cables. Keyboard System board Go to "TrackPoint IV Check" on page 115. Reconnect keyboard cables. TrackPoint board Keyboard System board LCD-Related Symptoms ThinkPad i Series 1400 (Part II) 125

  • 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
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
Symptom/Error
FRU/Action in Sequence
No beep, power-on
indicator turns on and
LCD is blank. But
you can see POST
on an external CRT.
±
Reconnect the LCD connec-
tors.
±
LCD inverter ID
±
LCD LVDS board (for
14.1–inch LCD)
±
LCD FPC cable
±
LCD inverter
±
LCD
±
System board
No beep, power-on
indicator turns on and
a blinking cursor
shown on LCD during
POST.
±
Ensure every connector is
connected tightly and cor-
rectly.
±
System board
No beep during
POST but system
runs correctly.
±
Adjust the audio volume
control.
±
Speaker connector
±
System board
Note:
The buzzer is on the
system board.
Keyboard/TrackPoint-Related
Symptoms
Symptom/Error
FRU/Action in Sequence
Keyboard (one or
more keys) doesn't
work.
±
Go to “Keyboard and External
Input Device Check” on
page 114.
±
Reconnect keyboard cables.
±
Keyboard
±
System board
TrackPoint does not
work.
±
Go to “TrackPoint IV Check”
on page
115.
±
Reconnect keyboard cables.
±
TrackPoint board
±
Keyboard
±
System board
LCD-Related Symptoms
ThinkPad i Series 1400 (Part II)
125