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Acer Aspire 5755 Aspire 5755, 5755G Service Guide - Page 159

Thermal Unit Failure,

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Thermal Unit Failure 0 If the Thermal Unit fails, perform the following: Start OK Fan power NG cable well connected? Connect it well OK Fan OK? OK NG Replace fan CPU Heat NG sink well seated? Seat it well Swap M/B Figure 4-12. Thermal Failure Troubleshooting 4-17

Section	Page
Aspire 5755/5755G Service Guide	1
Table of Contents	5
Chapter 1: Hardware Specification	11
Table of Contents	12
Features	15
Platform	15
System Memory	15
Display	15
Privacy Control	15
Storage Subsystem	16
Graphics	16
Audio Subsystem	16
Optical Media Drive	17
Communication	17
Dimension and Weight	17
Power Adapter and Battery	18
I/O Ports	18
Special Keys and Controls	18
Environment	19
Warranty	19
Optional Items	19
Software	19
Notebook Tour	21
Top View	21
Closed Front View	23
Left View	24
Right View	25
Base View	26
Touchpad Basics	27
Using the Keyboard	28
Windows Keys	29
Hotkeys	30
System Block Diagram	32
Specification Tables	33
Computer specifications	33
System Board Major Chips	34
Processor	34
Processor Specifications	34
CPU Fan True Value Table (Tj=100)	35
System Memory	35
Memory Combinations	36
Video Interface	36
BIOS	37
LAN Interface	37
Keyboard	37
Hard Disk Drive (AVL components)	38
Super-Multi Drive	40
LED 15.6”	42
Display Supported Resolution (LCD)	42
Graphics Controller	43
Display Supported Resolution (GPU)	43
Bluetooth Interface	44
Bluetooth Module	44
Camera	44
Mini Card	44
3G Card (N/A)	44
Audio Codec and Amplifier	45
Audio Interface	45
Wireless Module 802.11b/g/n	46
Battery	46
VRAM	46
USB Port	47
HDMI Port	47
AC Adapter	47
System Power Management	48
Card Reader	48
System LED Indicator	49
System DMA Specification	49
System Interrupt Specification	50
System IO Address Map	51
System I/O Address Specifications	52
Chapter 2: System Utilities	53
Table of Contents	54
BIOS Setup Utility	55
Navigating the BIOS Utility	55
BIOS	56
Information	56
Main	58
Security	60
Boot	64
Exit	65
BIOS Flash Utilities	66
DOS Flash Utility	67
WinFlash Utility	69
Remove HDD/BIOS Password Utilities	72
Removing BIOS Passwords	74
Miscellaneous Tools	75
Chapter 3: Machine Maintenance	79
Table of Contents	80
Introduction	83
General Information	83
Recommended Equipment	83
Maintenance Flowchart	84
Getting Started	85
Battery Pack Removal	86
Battery Pack Installation	86
Dummy Card Removal	87
Dummy Card Installation	87
3G Card Removal	88
3G Card Installation	89
3G Module Removal	90
3G Module Installation	92
Base Door Removal	93
Base Door Installation	93
HDD Module Removal	94
HDD Module Installation	94
HDD Carrier Removal	95
HDD Carrier Installation	95
ODD Module Removal	96
ODD Module Installation	98
WLAN Module Removal	99
WLAN Module Installation	100
DIMM Module Removal	101
DIMM Module Installation	102
Palmrest Assembly Removal	103
Palmrest Assembly Installation	106
Upper Cover Removal	107
Upper Cover Installation	110
RTC Battery Removal	111
RTC Battery Installation	111
USB Module Removal	112
USB Module Installation	113
Bluetooth Module Removal	114
Bluetooth Module Installation	115
Power Board Removal	116
Power Board Installation	117
Keyboard Assembly Removal	118
Keyboard Assembly Installation	119
Speaker Module Removal	120
Speaker Module Installation	121
Mainboard Removal	122
Mainboard Installation	124
Thermal Module Removal	125
Thermal Module Installation	126
CPU Removal	128
CPU Installation	128
3G Board Removal	129
3G Board Installation	130
LCD (Liquid Crystal Display) Module Removal	131
LCD Module Installation	132
LCD Bezel Removal	133
LCD Bezel Installation	134
Camera Module Removal	135
Camera Module Installation	135
LCD Panel Removal	136
LCD Panel Installation	136
LCD Brackets Removal	137
LCD Brackets Installation	137
WLAN and 3G Antenna Removal	140
WLAN and 3G Antenna Installation	141
Microphone Set Removal	142
Microphone Set Installation	142
Chapter 4: Troubleshooting	143
Table of Contents	144
Introduction	145
General Information	145
Power On Issues	146
No Display Issues	147
LCD Failure	149
Keyboard Failure	150
Touchpad Failure	151
Internal Speaker Failure	152
Microphone Failure	154
USB Failure	155
Wireless Function Failure	156
Bluetooth Failure	157
Card Reader Failure	158
Thermal Unit Failure	159
Other Functions Failure	160
CosmeticFailure	161
ODD Failure	162
Intermittent Problems	166
Undetermined Problems	166
Post Codes	167
Chapter 5: Jumper and Connector Locations	175
Table of Contents	176
Mainboard	177
USB Board	179
Power Board	180
Card Reader	181
Clearing Password Check and BIOS Recovery	182
Clearing Password Check	182
BIOS Recovery by Crisis Disk	184
Chapter 6: FRU List	191
Table of Contents	192
Exploded Diagrams	194
Main Assembly	194
LCD Assembly	196
FRU List	198
Screw List	213
Chapter 7: Model Definition and Configuration	215
Table of Contents	216
Aspire 5755	217
Aspire 5755G	242
Chapter 8: Test Compatible Components	313
Table of Contents	314
Microsoft® Windows® 7 Environment Test	316
Aspire 5755/5755G	316
Chapter 9: Online Support Information	327
Table of Contents	327

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