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Acer Aspire 5741 Service Guide - Page 161

USB/B Board, Power Board, For NEW50/NEW90 WLAN LED - new70

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USB/B Board ITEM JUSB1/JUSB2 Power Board DESCRIPTION USB Connector ITEM LED1 LED2 LED3 LED4 LED5 LED6 LED7 LED8 Chapter 5 DESCRIPTION For NEW70 ON/OFF LED For NEW80 ON/OFF LED For NEW90 ON/OFF LED For NEW70 MEDIA LED For NEW80 MEDIA LED For NEW50/NEW90 MEDIA LED For NEW70 WWAN LED For NEW80 WLAN LED ITEM LED9 LED10 LED11 LED12 SW1 SW2 SW3 DESCRIPTION For NEW50 WWAN LED For NEW70 WLAN LED For NEW50 POWER LED For NEW50/NEW90 WLAN LED For NEW70 Power BTN For NEW80 Power BTN For NEW90 Power BTN 151

Section	Page
System Specifications	11
Features	11
System Block Diagram	15
Your Acer Notebook tour	16
Front View	16
Closed Front View	17
Left View	17
Right View	18
Bottom View	19
Indicators	19
TouchPad Basics	20
Using the Keyboard	21
Lock Keys and embedded numeric keypad	21
Windows Keys	22
Hot Keys	23
Hardware Specifications and Configurations	24
System Utilities	31
BIOS Setup Utility	31
Navigating the BIOS Utility	31
Aspire 5741/5741G BIOS	32
Information	32
Main	33
Security	34
Boot	37
Exit	38
BIOS Flash Utilities	39
DOS Flash Utility	40
WinFlash Utility	42
Remove HDD/BIOS Password Utilities	43
Machine Disassembly and Replacement	49
Disassembly Requirements	49
Pre-disassembly Instructions	50
Disassembly Process	51
External Module Disassembly Process	52
External Modules Disassembly Flowchart	52
Removing the Battery Pack	53
Removing the SD Dummy Card	54
Removing the Optical Drive Module	55
Removing the Logic Lower Door	57
Removing the 3G Cover	58
Removing the DIMM Module	59
Removing the WLAN Module	60
Removing the Hard Disk Drive Module	62
Main Unit Disassembly Process	64
Main Unit Disassembly Flowchart	64
Removing the Keyboard	65
Removing the Upper Cover	67
Removing the Left Speaker Module	71
Removing the Right Speaker Module	73
Removing the Power Board	75
Removing the TouchPad Bracket	76
Removing the Card Reader Board	78
Removing the USB Board	79
Removing the Bluetooth Board	80
Removing the Mainboard	81
Removing the Thermal Module	85
Removing the CPU	87
LCD Module Disassembly Process	88
LCD Module Disassembly Flowchart	88
Removing the LCD Assembly	89
Removing the LCD Bezel	92
Removing the Camera Module	93
Removing the LCD Panel	94
Removing the LCD Brackets and FPC Cable	96
Removing the Microphone Cable	99
Removing the Antennas	101
LCD Module Reassembly Procedure	103
Replacing the Antennas	103
Replacing the Microphone Cable	105
Replacing the LCD Brackets and FPC Cable	106
Replacing the LCD Panel	108
Replacing the Camera Module	109
Replacing the LCD Bezel	110
Replacing the LCD Assembly	111
Main Module Reassembly Procedure	114
Replacing the CPU	114
Replacing the Thermal Module	115
Replacing the Mainboard	116
Replacing the Bluetooth Board	119
Replacing the USB Board	120
Replacing the Card Reader Board	121
Replacing the TouchPad Bracket	122
Replacing the Power Board	124
Replacing the Right Speaker Module	125
Replacing the Left Speaker Module	126
Replacing the Upper Cover	127
Replacing the Keyboard	130
Replacing the Hard Disk Drive Module	131
Replacing the WLAN Module	132
Replacing the DIMM Modules	133
Replacing the 3G Cover	134
Replacing the Logic Lower Door	135
Replacing the ODD Module	136
Replacing the SD Dummy Card	137
Replacing the Battery	138
Troubleshooting	139
Common Problems	139
Power On Issue	140
No Display Issue	141
Random Loss of BIOS Settings	142
LCD Failure	143
Built-In Keyboard Failure	143
TouchPad Failure	144
Internal Speaker Failure	144
HDD Not Operating Correctly	146
ODD Failure	147
Wireless Function Failure	150
Thermal Unit Failure	150
External Mouse Failure	151
Other Failures	151
Intermittent Problems	152
Undetermined Problems	152
Post Codes	153
Jumper and Connector Locations	159
Top View	159
Bottom View	160
USB/B Board	161
Power Board	161
3G/B Board	162
CR/B Board	162
Clearing Password Check and BIOS Recovery	163
Clearing Password Check	163
Clear CMOS Jumper	163
BIOS Recovery by Crisis Disk	164
FRU (Field Replaceable Unit) List	165
Aspire 5741/5741G Exploded Diagrams	166
Main Assembly	166
Upper Assembly	167
LCD Assembly	168
Aspire 5741/5741G FRU List	170
Screw List	178
Model Definition and Configuration	180
Aspire 5741	181
Aspire 5741G	201
Test Compatible Components	239
Microsoft® Windows® 7 Environment Test	240
Online Support Information	253

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