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Acer Aspire 5742 Service Guide - Page 200

Power Board, BOTTOM

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Discrete (ATI) ITEM JUSB1/JUSB2 Power Board UMA DESCRIPTION USB Connector Item LED1 LED2 TOP Description PEW71/91 ON/OFF LED PEW71/91 MEDIA LED Item LED3 SW1 BOTTOM Description PEW71/91 WLAN LED PEW71/91 Power BTN 190 Chapter 1

Section	Page
System Specifications	11
Features	11
System Block Diagram	16
UMA	16
Discrete (nVidia)	17
Discrete (ATI)	18
Your Acer Notebook tour	19
Top View	19
Rear view	20
Left View	21
Right View	22
Base view	23
Indicators	24
Touch Pad Basics	25
Using the Keyboard	26
Lock Keys and embedded numeric keypad	26
Windows Keys	27
Hot Keys	28
Hardware Specifications and Configurations	29
System Utilities	41
BIOS Setup Utility	41
Navigating the BIOS Utility	41
Aspire 5742/5742G/5742Z/5742ZG BIOS	42
Information	42
Main	43
Security	44
Boot	47
Exit	48
BIOS Flash Utilities	49
DOS Flash Utility	50
WinFlash Utility	51
Remove HDD/BIOS Password Utilities	52
Machine Disassembly and Replacement	57
Disassembly Requirements	57
Pre-disassembly Instructions	58
Disassembly Process	59
External Module Disassembly Process	60
External Modules Disassembly Flowchart	60
Removing the Battery Pack	61
Removing the SD Dummy Card	62
Removing the ODD Module	63
Removing the Logic Lower Door	65
Removing the 3G Cover (Discrete Only)	66
Removing the RTC Battery (UMA Only)	67
Removing the DIMM Module	69
Removing the WLAN Module	70
Removing the HDD module Module	72
Removing the Keyboard	74
Main Unit Disassembly Process	76
Main Unit Disassembly Flowchart	76
Removing the Upper Cover	77
Removing the Speaker Module	82
Removing the Power Board	84
Removing the Touch Pad FFC	86
Removing the Card Reader Module (Discrete Only)	88
Removing the USB Board	90
Removing the Bluetooth Board	92
Removing the ODD Connector Board (UMA Only)	94
Removing the Mainboard	95
Removing the Thermal Module	99
Removing the CPU	101
Removing the LCD Module	102
Removing the DC-In Assembly	106
LCD Module Disassembly Process	107
LCD Module Disassembly Flowchart	107
Removing the LCD Bezel	108
Removing the CCD Module	110
Removing the Inverter Module (LCD Only)	111
Removing the LCD/LED Panel	114
Removing the LCD Brackets	116
Removing the LVDS Cable	117
Removing the Microphone Cable	118
Removing the Antennas	120
LCD Module Reassembly Procedure	121
Replacing the Antennas	121
Replacing the Microphone Cable	122
Replacing the LVDS Cable	124
Replacing the LCD Brackets	125
Replacing the LCD/LED Panel	126
Replacing the Inverter Board	127
Replacing the CCD Module	129
Replacing the LCD Bezel	130
Main Module Assembly Procedure	131
Replacing the DC-In Assembly	131
Replacing the LCD Module	132
Replacing the CPU	135
Replacing the Thermal Module	137
Replacing the Mainboard	139
Replacing the ODD Connector Board (UMA Only)	143
Replacing the Bluetooth Board	144
Replacing the USB Board	145
Replacing the Card Reader Board (Discrete Only)	147
Replacing the Touchpad FFC	149
Replacing the Power Board	150
Replacing the Speaker Module	151
Replacing the Upper Cover	152
Replacing the RTC Battery (UMA Only)	156
Replacing the HDD Module	157
Replacing the WLAN Module	159
Replacing the DIMM Modules	161
Replacing the 3G Cover (Discrete Only)	162
Replacing the Lower Logic Door	163
Replacing the ODD Module	164
Replacing the Keyboard	166
Replacing the SD Dummy Card	167
Replacing the Battery	168
Troubleshooting	169
Common Problems	169
Power On Issue	170
No Display Issue	171
Random Loss of BIOS Settings	172
LCD Failure	173
Internal Keyboard Failure	173
Touch Pad Failure	174
Internal Speaker Failure	174
Microphone Record Failure	176
USB Failure (Right side)	177
HDD Not Operating Correctly	178
ODD Failure	179
Wireless Function Failure	182
Bluetooth Function Test Failure	182
2 in 1 card Function Test Failure	183
Thermal Unit Failure	183
External Mouse Failure	184
Cosmetic Failure	184
Other Failures	185
Intermittent Problems	186
Undetermined Problems	186
Post Codes	187
Jumper and Connector Locations	193
Top View	193
Bottom View	196
USB/B Board	199
Power Board	200
CR/B Board	203
ODD Board	204
Clearing Password Check and BIOS Recovery	205
Clearing Password Check	205
Clear CMOS Jumper	205
BIOS Recovery by Crisis Disk	207
FRU (Field Replaceable Unit) List	209
Aspire Exploded Diagrams	210
Main Assembly	210
Lower Cover	212
LCD Assembly	213
LED Assembly	214
Aspire FRU List	215
Screw List	239
Model Definition and Configuration	241
Aspire 5742/5742G	241
Aspire 5742Z/5742ZG	267
Test Compatible Components	283
Online Support Information	289

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