Toshiba M200-ST2002 Maintenance Manual - Page 79

Procedure 4, Replacement Check, Troubleshooting, Replacement Procedures

Get Toshiba M200-ST2002 PDF manuals and user guides View all Toshiba M200-ST2002 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 79 highlights

2.8 Display Troubleshooting 2 Troubleshooting Procedure 4 Replacement Check The display unit has a FL inverter board, Display module, System board, LCD harness and Display ON/OFF switch. Any of the components may be damaged. Disassemble the computer following the steps described in Chapter 4, Replacement Procedures, then perform the following checks: (1) If characters or graphics are not displayed on the internal display, perform Check 1. (2) If characters are displayed on the internal display but the display is not normal, perform Check 2. (3) If characters are displayed on the internal display but the display is dark (the back-light does not light), perform Check 5. Check 1 The display ON/OFF switch may be damaged. Remove the display ON/OFF switch and repeat Procedure 4. If there is still an error, go to Check 2. Check 2 The LCD harness may be damaged. Replace the damaged harness with a new one and repeat Procedure 4. If there is still an error, go to Check 3. Check 3 The display module may be damaged. Replace it with a new one and repeat Procedure 4. If there is still an error, go to Check 4. Check 4 The FL inverter board may be damaged. Replace it with a new one and repeat Procedure 4. If there is still an error, go to Check 5. Check 5 The FL tube may be damaged. Replace it with a new one and repeat Procedure 4. If there is still an error, go to Check 6. Check 6 The display controller of the system board may be damaged. Replace the system board with a new one. Portege M200 Maintenance Manual (960-457) 2-41

  • 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
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
  • 221
  • 222
  • 223
  • 224
  • 225
  • 226
  • 227
  • 228
  • 229
  • 230
  • 231
  • 232
  • 233
  • 234
  • 235
  • 236
  • 237
  • 238
  • 239
  • 240
  • 241
  • 242
  • 243
  • 244
  • 245
  • 246
  • 247
  • 248
  • 249
  • 250
  • 251
  • 252
  • 253
  • 254
  • 255
  • 256
  • 257
  • 258
  • 259
  • 260
  • 261
  • 262
  • 263
  • 264
  • 265
  • 266
  • 267
  • 268
  • 269
  • 270
  • 271
  • 272
  • 273
  • 274
  • 275
  • 276
  • 277
  • 278
  • 279
  • 280
  • 281
  • 282
  • 283
  • 284
  • 285
  • 286
  • 287
  • 288
  • 289
  • 290
  • 291
  • 292
  • 293
  • 294
  • 295
  • 296
  • 297
  • 298
  • 299
  • 300
  • 301
  • 302
  • 303
  • 304
  • 305
  • 306
  • 307
  • 308
  • 309
  • 310
  • 311
  • 312
  • 313
  • 314
  • 315
  • 316
  • 317
  • 318
  • 319
  • 320
  • 321
  • 322
  • 323
  • 324
  • 325
2.8
Display
Troubleshooting
2
Troubleshooting
Portege M200 Maintenance Manual (960-457)
2-41
Procedure 4
Replacement Check
The display unit has a FL inverter board, Display module, System board, LCD harness and
Display ON/OFF switch. Any of the components may be damaged. Disassemble the computer
following the steps described in Chapter 4,
Replacement Procedures,
then perform the
following checks:
(1)
If characters or graphics are not displayed on the internal display, perform Check 1.
(2)
If characters are displayed on the internal display but the display is not normal,
perform Check 2.
(3)
If characters are displayed on the internal display but the display is dark (the back-light
does not light), perform Check 5.
Check 1
The display ON/OFF switch may be damaged. Remove the display ON/OFF
switch and repeat Procedure 4. If there is still an error, go to Check 2.
Check 2
The LCD harness may be damaged. Replace the damaged harness with a new one
and repeat Procedure 4. If there is still an error, go to Check 3.
Check 3
The display module may be damaged. Replace it with a new one and repeat
Procedure 4. If there is still an error, go to Check 4.
Check 4
The FL inverter board may be damaged. Replace it with a new one and repeat
Procedure 4. If there is still an error, go to Check 5.
Check 5
The FL tube may be damaged. Replace it with a new one and repeat Procedure 4.
If there is still an error, go to Check 6.
Check 6
The display controller of the system board may be damaged. Replace the system
board with a new one.