Toshiba A105 S4064 Maintenance Manual - Page 72

2.16

Cooling Module

2

Troubleshooting

Satellite A100/A105 / TECRA A7

Maintenance Manual

2-29

2.16 Cooling Module

To check if the computer’s cooling module is defective or malfunctioning, follow the

troubleshooting procedures below as instructed.

Procedure 1

Test Program Check

Procedure 2

Connector Check and Replacement Check

Procedure 1 Test Program Check

Execute the Fan On/Off test program available as part of the maintenance test program.

This

test program checks the cooling module.

Insert the diagnostics bootable CD in the

computer's CD, turn on the computer and run the test.

See Chapter 3 for information on how

to perform the test.

If any error is detected by the test, go to Procedure 2.

Procedure 2 Connector Check and Replacement Check

The cooling module is connected to the system board.

If the cooling module malfunctions,

there may be a bad connection between the cooling module and the system board or either

might be faulty.

Disassemble the computer following the steps described in Chapter 4 and perform the

following checks:

Check 1

Make sure the cooling module has been firmly connected to the connector

on the system board.

Also make sure that the tape is not stuck to any part

of the fan and that the fan is free of fore ign matter.

Cooling module

System board

CPU

If the connector is disconnected, connect it firmly to the system board and

return to Procedure 1.

If the tape is stuck to any part of the fan, stick it back

to the specified point.

If a foreign matter is found in the fan, remove it and

then return to Procedure 1.

If there is still an error, perform Check 2.

Check 2

The cooling module may be faulty.

Replace it with a new one following the

steps in Chapter 4.

If the cooling module is still not functioning properly,

perform Check 3.

Check 3

The memory may be defective. Replace the memory module with a new

one following the steps described in Chapter 4. If the problem persist

,

perform Check 4.

Check 4

The CPU may be faulty. Disassemble the computer following the steps

described in Chapter 4 and replace the CPU with a new one.

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

Toshiba A105 S4064 Maintenance Manual - Page 72

Cooling Module

Page 72 highlights