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Acer TravelMate 8481T Acer TravelMate 8481, 8481T, 8481TG Notebook Service Gui - Page 121

Troubleshooting

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CHAPTER 4 Troubleshooting

Section	Page
TravelMate 8481/8481G/8481T/8481TG Service Guide	1
Table of Contents	5
Chapter 1: Hardware Specification	11
Table of Contents	12
Hardware Specifications and Configurations	15
Features	15
Operating System	15
CPU and Chipset	15
Memory	15
Display	15
Audio	15
Graphics	16
Storage	16
Webcam	16
Wireless and Networking	17
Security	17
Dimensions and Weight	17
Power Adapter and Battery	17
Input and Control	18
Input and Output	19
Options and Accessories	19
System Compliance	19
Warranty	19
Environment	20
Software	20
Notebook Tour	22
Top View	22
Closed Front View	24
Left View	25
Right View	26
Base View	27
Touchpad Basics	28
Using the Keyboard	29
Windows Keys	30
Hotkeys	31
System Block Diagram	33
Specification Tables	34
Computer specifications	34
System Board Major Chips	35
Processor	35
Processor Specifications (Taken from FRU)	36
CPU Fan True Value Table (Tj=100)	36
System Memory	36
Memory Combinations	37
Video Interface	37
BIOS	38
LAN Interface	38
Keyboard	39
Hard Disk Drive (AVL components)	39
LED 14.0”	41
LCD Inverter	42
Display Supported Resolution (LCD Supported Resolution)	42
Graphics Controller	42
Display Supported Resolution (GPU Supported Resolution)	43
Bluetooth Interface	43
Bluetooth Module	43
Camera	43
Mini Card	44
Audio Codec and Amplifier	44
Audio Interface	45
Wireless Module 802.11b/g/n	45
Battery	45
VRAM	46
USB Port	46
HDMI Port	46
eSATA Port	46
AC Adapter	47
System Power Management	47
Card Reader	47
System LED Indicator	48
System DMA Specification	49
System Interrupt Specification	50
System IO Address Map	51
System IO 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	66
Exit	67
BIOS Flash Utilities	68
DOS Flash Utility	69
WinFlash Utility	71
HDD/BIOS Password Utilities	74
Clearing HDD Passwords	74
Clearing BIOS Passwords	76
Miscellaneous Tools	78
Using Boot Sequence Selector	78
Using Boot Manager	79
Using DMITools	80
Using LAN MAC EEPROM Utility	82
Chapter 3: Machine Maintenance	83
Table of Contents	84
Introduction	85
General Information	85
Recommended Equipment	85
Screw Table	86
Maintenance Flowchart	87
Getting Started	88
Battery Pack Removal	89
Battery Pack Installation	89
Dummy Card Removal	90
Dummy Card Installation	90
Hard Disk Drive (HDD) Module Removal	91
HDD Module Installation	92
Dual In-Line Memory Module (DIMM) Removal	94
DIMM Module Installation	95
Keyboard Removal	96
Keyboard Installation	98
Upper Cover Removal	99
Upper Cover Installation	101
MSATA SSD Module Removal	103
MSATA SSD Module Installation	103
Bluetooth Module Removal	104
Bluetooth Module Installation	104
Universal Serial Bus (USB) Module Removal	105
USB Module Installation	105
WLAN Module Removal	106
WLAN Module Installation	106
Mainboard Removal	107
Mainboard Installation	109
RTC Battery Removal	110
RTC Battery Installation	110
FAN Module Removal	111
FAN Module Installation	111
Thermal Module Assembly Removal	112
Thermal Module Assembly Installation	113
Speakers Removal	114
Speakers Installation	114
Microphone Set Removal	115
Microphone Set Installation	115
Function Board Removal	116
Function Board Installation	116
Touchpad Button Assembly Removal	117
Touchpad Button Assembly Installation	117
LCD (Liquid Crystal Display) Module Removal	118
LCD Module Installation	119
Kensington Lock Bracket Removal	120
Kensington Lock Bracket Installation	120
Chapter 4: Troubleshooting	121
Table of Contents	122
Introduction	123
General Information	123
Power On Issues	124
No Display Issues	125
LCD Failure	127
Keyboard Failure	128
Touchpad Failure	129
Internal Speaker Failure	130
Microphone Failure	132
USB Failure	133
Wireless Function Failure	134
Bluetooth Failure	135
Thermal Unit Failure	136
MSATA SDD test Failure	137
Cosmetic Failure	138
Other Functions Failure	139
Intermittent Problems	141
Undetermined Problems	141
Post Codes	142
Chapter 5: Jumper and Connector Locations	151
Table of Contents	152
Jumper and Connector Locations	153
Mainboard	153
Clearing Password Check and BIOS Recovery	155
Clearing Password	155
BIOS Recovery by Crisis Disk	156
Chapter 6: FRU List	161
Table of Contents	162
Exploded Diagrams	164
Main Assembly	164
LCD Assembly	166
FRU List	167
Screw List	174
Chapter 7: Model Definition and Configuration	175
Table of Contents	176
TravelMate 8481	177
TravelMate 8481G	185
TravelMate 8481T	188
TravelMate 8481TG	209
Chapter 8: Test Compatible Components	215
Table of Contents	216
Microsoft® Windows® 7 Environment Test	218
TravelMate 8481/8481G/8481T/8481TG	218
Chapter 9: Online Support Information	227
Table of Contents	228
Introduction	229

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