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Toshiba A105 S4064 Maintenance Manual - Page 156

Replacement Procedures, 1 General, CAUTION, computer or Toshiba-recommended equivalents.

UPC - 032017706019

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4 Replacement Procedures 4.1 General CAUTION: 1. Before replacing a component, make sure that the replacement component meets the required specifications. To avoid computer failures, never use components that do not meet the specifications. 2. To avoid internal damage such as short circuits and fire, never drop metal objects such as screws, pins, paper clips, etc. into the components. When a screw is removed, be sure to replace a screw that is the same size as the original screw. Make sure that all the screws are fastened securely. Loose screws can cause short circuits, overheating, smoke, or fire. 3. Before raising a FRU or other component, make sure that all the component cables have been disconnected to avoid the risk of electrical shock caused by accidental contact with the energized components. 4. For AC input, be sure to use the AC adapter and AC power cable that come with your computer or Toshiba-recommended equivalents. 5. To avoid the risk of electrical shock, make sure that all the replacement components meet the specifications of the computer and that all the cables and connectors are fastened securely. 6. Inside the PC are components that become hot during operation (such as the CPU and cooling module). To avoid burns, let the hot components cool down before starting inspection or repair task. 4-4 Satellite A100/A105 / TECRA A7 Maintenance Manual

Section	Page
Toshiba Personal Computer Satellite A100/A105 TECRA A7 (PSAA8/PSAA9) (PTA70/PTA71) (PSAAx) Maintenance Manual	1
Table of Contents	7
Chapter 1 Hardware Overview	15
1.1 Features	19
1.2 System Unit Components	27
1.3 2.5-inch HDD	33
1.4 DVD-ROM Drive	34
1.5 CD-RW/DVD-ROM Drive	35
1.6 DVD Super Multi (+-R Double Layer)	36
1.7 Power Supply	37
1.8 Batteries	38
Chapter 2 Troubleshooting	40
2.1 Outline	44
2.2 Basic Flowchart	45
2.3 Power Supply	49
2.4 System Board	52
2.5 2.5-inch HDD	55
2.6 Keyboard	60
2.7 Display	61
2.8 ODD (Optical Disk Drive)	63
2.9 LAN	65
2.10 SD/MS/MS pro/MMC/XD Card(Optional)	66
2.11 Finger Print(Optional)	67
2.12 3D Sensor	68
2.13 Parallel Port(Optional)	69
2.14 Audio Test	70
2.15 IEEE 1394 Test	71
2.16 Cooling Module	72
Chapter 3 Diagnostic Programs	73
3.1 General	77
3.2 Quick Start	79
3.3 Options	99
3.4 Subtests	109
3.5 System Test	112
3.6 Memory Test	116
3.7 Storage	122
3.8 Video	126
3.9 Communication (COMM)	135
3.10 Peripheral	137
3.11 Error Codes and description	139
3.12 Quick Test Item List	145
Chapter 4 Replacement Procedures	146
4.1 General	153
4.2 HDD	175
4.3 Speaker Cover and Keyboard	178
4.4 Bluetooth Card	180
4.5 Wireless LAN Card	182
4.6 ODD Bay Module	184
4.7 Display Assembly	187
4.8 Top Cover	189
4.9 CPU Cooling Module and Fan	192
4.10 VGA Board (for VGA Board Model)	197
4.11 CPU	199
4.12 USB Board, Finger Print Board and Print Board	202
4.13 System Board, MIC cable, AC-IN cable	204
4.14 Display Mask	206
4.15 FL Inverter Board	208
4.16 LCD Modules	210
4.17 Speakers	213
4.18 Switch Cover and Switch Board	214
4.19 Touch Pad and Button Board	218
Appendices	222
Appendix A Handling the LCD Module	230
Appendix B Board Layout	235
Appendix C Pin Assignments	239
Appendix D Keyboard Scan/Character Codes	269
Appendix E Key Layout	277
Appendix F BIOS Rewrite Procedures	291
Appendix G EC/KBC Rewrite Procedures	292

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4 Replacement Procedures

4.1 General

4-4

Satellite A100/A105 / TECRA A7

Maintenance Manual

CAUTION:

Before replacing a component, make sure that the replacement component meets the

required specifications. To avoid computer failures, never use components that do not

meet the specifications.

To avoid internal damage such as short circuits and fire, never drop metal objects such

as screws, pins, paper clips, etc. into the components. When a screw is removed, be sure

to replace a screw that is the same size as the original screw.

Make sure that all the

screws are fastened securely. Loose screws can cause short circuits, overheating, smoke,

or fire.

Before raising a FRU or other component, make sure that all the component cables have

been disconnected to avoid the risk of electrical shock caused by accidental contact with

the energized components.

For AC input, be sure to use the AC adapter and AC power cable that come with your

computer or Toshiba-recommended equivalents.

To avoid the risk of electrical shock, make sure that all the replacement components

meet the specifications of the computer and that all the cables and connectors are

fastened securely.

Inside the PC are components that become hot during operation (such as the CPU and

cooling module). To avoid burns, let the hot components cool down before starting

inspection or repair task.