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Acer Aspire 4752G Aspire 4352, 4752, 4752G, 4752Z Service Guide - Page 167

USB Failure,

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USB Failure 0 If the USB fails, perform the following, one at a time. Do not replace a non-defective FRU: Figure 4-8. USB Failure Troubleshooting 4-13

Section	Page
Aspire 4752/4752G/4752Z/4752ZG/4352/4352G	1
CHAPTER 1 - Hardware Specifications	11
Hardware Specifications and Configurations	15
Features	15
Operating System	15
Platform	15
System Memory	15
Display	15
Graphics	15
Storage Subsystem	16
Audio Subsystem	16
Communication	17
Privacy Control	17
Power Adapter and Battery	17
Keyboard and Pointing Device	17
I/O Ports	18
Software and Tools	18
Optional Items	20
Warranty	20
Dimensions and Weight	20
Environment	20
Notebook Tour	21
Open Front View	21
Close Front View	23
Left View	24
Right View	25
Base View	26
Touchpad Basics	27
Keyboard	28
D2D Recovery	32
System Block Diagram	32
Specification Tables	33
CHAPTER 2 - System Utilities	51
System Utilities	53
BIOS Setup Utility	53
Navigating the BIOS Utility	53
BIOS Menus	54
BIOS Flash Utilities	62
DOS Flash Utility	63
WinFlash Utility	63
Remove HDD/BIOS Password Utilities	64
Removing the HDD Password	64
Removing the BIOS Passwords	65
Clearing the BIOS Passwords	66
Using DMI Tools	67
LAN EEPROM Utility	67
CHAPTER 3 - Machine Maintenance	69
Machine Maintenance	73
Machine Disassembly and Replacement	73
Recommended Equipment	73
Replacement Requirements	73
Pre-disassembly Instructions	74
Disassembly Process	75
External Module Disassembly Process	76
External Modules Disassembly Flowchart	76
Removing the Battery Pack	77
Removing the ODD Module	78
Removing the Back Cover	80
Removing the HDD Module	81
Removing the WLAN Module	83
Removing the Memory Modules	85
Removing the Keyboard	86
Main Unit Disassembly Process	88
Main Unit Disassembly Flowchart	88
Removing the Palmrest Module/Upper Case	89
Removing the Touchpad Board	92
Removing the Left & Right Speakers	93
Removing the Power Button Board	95
Removing the USB Board	97
Removing the Bluetooth Module	98
Removing the RTC Battery	99
Removing the Mainboard	100
Removing the Thermal Module	102
Removing the CPU	104
Removing the LCD Module	105
LCD Module Disassembly Process	107
LCD Module Disassembly Flowchart	107
Removing the LCD Bezel	108
Removing the LCD Panel	110
Removing the Camera Board	112
Removing the Microphone	113
Removing the Antenna Cable	114
Removing the LCD Brackets	115
Removing the LCD FPC Cable	116
LCD Module Reassembly Process	117
Replacing the Antenna Cable	117
Replacing the Microphone	118
Replacing the Camera Board	119
Replacing the LCD FPC Cable	120
Replacing the LCD Brackets	121
Replacing the LCD Panel	122
Replacing the LCD Bezel	124
Main Unit Reassembly Process	126
Replacing the LCD Module	126
Replacing the CPU	128
Replacing the Thermal Module	129
Replacing the Mainboard	131
Replacing the RTC Battery	133
Replacing the Bluetooth Module	134
Replacing the USB Board	135
Replacing the Power Button Board	136
Replacing the Left & Right Speakers	138
Replacing the Touchpad Board	140
Replacing the Palmrest Module/Upper Case	141
External Module Reassembly Process	144
Replacing the Keyboard	144
Replacing the Memory Modules	146
Replacing the WLAN Module	147
Replacing the HDD Module	149
Replacing the Base Cover	151
Replacing the ODD Module	152
Replacing the Battery Pack	154
CHAPTER 4 - Troubleshooting	155
Troubleshooting	157
Introduction	157
General Information	157
Power On Issues	158
No Display Issues	159
LCD Failure	161
Keyboard Failure	162
Touchpad Failure	163
Internal Speaker Failure	164
Microphone Failure	166
USB Failure	167
WLAN Failure	168
Bluetooth Failure	169
Card Reader Failure	170
Thermal Unit Failure	171
Other Functions Failure	172
Intermittent Problems	173
Undetermined Problems	173
Error Codes	174
POST Codes	180
CHAPTER 5 - Jumper and Connector Locations	187
Jumper and Connector Locations	189
Mainboard Layout	189
Clearing Password Check and BIOS Recovery	192
Clearing the BIOS Passwords	192
Performing a BIOS Recovery	193
CHAPTER 6 - FRU List	195
FRU (Field Replaceable Unit) List	197
Main Assembly	198
LCD Assembly	200
CHAPTER 7 - Test Compatible Components	213
Test Compatible Components	215
Microsoft Windows 7 Environment Test	216

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