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Acer TravelMate 8473 Acer TravelMate 6495T, TG and 8743, T, TG Service Guide - Page 177

Thermal Unit Failure,

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Thermal Unit Failure 0 If the Thermal Unit fails, perform the following, one at a time. Do not replace a non-defective FRU: Figure 4-12. Thermal Unit Failure Troubleshooting 4-17

Section	Page
TravelMate 6495T/6495TG/6495Te/8473T/8473TG	1
Hardware Specifications	9
Hardware Specifications and Configurations	13
Features	13
Operating System	13
Platform	13
System Memory	13
Display	13
Graphics	13
Storage Subsystem	14
Audio Subsystem	14
Communication	15
Privacy Control	15
Power Adapter and Battery	15
Keyboard and Pointing Device	15
I/O Ports	16
Software and Tools	16
Optional Items	18
Warranty	18
Dimensions and Weight	18
Environment	18
Notebook Tour	19
Open Front View	19
Close Front View	22
Left View	23
Right View	24
Base View	25
Touchpad Basics	26
Keyboard	27
Hotkeys	29
Special Keys	30
Specification Tables	34
System Utilities	55
BIOS Setup Utility	55
Navigating the BIOS Utility	55
WinFlash Utility	65
Removing the HDD Password	66
Removing the BIOS Passwords	67
Clearing the BIOS Passwords	68
LAN EEPROM Utility	69
Machine Maintenance	75
Machine Disassembly and Replacement	75
Recommended Equipment	75
Replacement Requirements	75
Pre-disassembly Instructions	76
Disassembly Process	77
External Module Disassembly Process	78
External Modules Disassembly Flowchart	78
Removing the Battery Pack	79
Removing the ODD Module	80
Removing the WLAN Module	82
Removing the Keyboard	84
Removing the Base Door	86
Removing the HDD Module	87
Removing the Memory Modules	90
Main Unit Disassembly Process	91
Main Unit Disassembly Flowchart	91
Removing the Palmrest Module/Upper Cover	92
Removing the Power Button Board	96
Removing the Click Button with Bracket	98
Removing the Touchpad Board	100
Removing the Speaker	101
Removing the USB Board	102
Removing the Bluetooth Module	103
Removing the Mainboard	104
Removing the Thermal Module	107
Removing the CPU	109
Removing the I/O Board	110
Removing the LCD Module	111
LCD Module Disassembly Process	113
LCD Module Disassembly Flowchart	113
Removing the LCD Bezel	114
Removing the Left and Right Hinges	116
Removing the LCD Panel	117
Removing the Camera Board	119
Removing the Microphone	120
LCD Module Reassembly Process	121
Replacing the Microphone	121
Replacing the Camera Board	122
Replacing the LCD Panel	123
Replacing the Left and Right Hinges	125
Replacing the LCD Bezel	126
Main Unit Reassembly Process	128
Replacing the LCD Module	128
Replacing the I/O Board	130
Replacing the CPU	131
Replacing the Thermal Module	132
Replacing the Mainboard	134
Replacing the Bluetooth Module	137
Replacing the USB Board	138
Replacing the Speaker	139
Replacing the Touchpad Board	140
Replacing the Click Button with Bracket	141
Replacing the Power Button Board	143
Replacing the Palmrest Module/Upper Cover	145
External Module Reassembly Process	149
Replacing the Memory Modules	149
Replacing the HDD Module	150
Replacing the Base Door	153
Replacing the Keyboard	154
Replacing the WLAN Module	155
Replacing the ODD Module	157
Replacing the Battery Pack	159
Troubleshooting	163
Introduction	163
General Information	163
Power On Issues	164
No Display Issues	165
LCD Failure	167
Keyboard Failure	168
Touchpad Failure	169
Internal Speaker Failure	170
Microphone Failure	172
USB Failure	173
WLAN Failure	174
Bluetooth Failure	175
Card Reader Failure	176
Thermal Unit Failure	177
Other Functions Failure	178
Intermittent Problems	179
Undetermined Problems	179
Error Codes	180
POST Codes	186
Component Codes	186
Jumper and Connector Locations	193
Mainboard Layout	193
Clearing Password Check and BIOS Recovery	195
Clearing the BIOS Passwords	195
Performing a BIOS Recovery	196
FRU (Field Replaceable Unit) List	201
Main Assembly	203
LCD Assembly	205
Model Definition and Configuration	219
TravelMate 6495T/6495TG/6495Te/8473T/8473TG	219
Test Compatible Components	785
Microsoft Windows 7 Environment Test	786
Online Support Information	793

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