Emachines D720 User Manual download pdf (Page 129)

Chapter 4 119

Modem Function Failure

If the internal Modem fails, perform the following actions one at a time to correct the problem. Do not replace a

non-defective FRUs:

Wireless Function Failure

If the WLAN fails, perform the following actions one at a time to correct the problem. Do not replace a non-

defective FRUs:

1 2 ... 124 125 126 127 128 129 130 131 132 133 134 ... 173 174

Service Guide 1
Revision History 2
Copyright 3
Disclaimer 3
Conventions 4
Table of Contents 10
System Specifications 11
System Block Diagram 13
Your Acer Notebook tour 14
Closed Front View 15
Rear View 15
Left View 16
Right View 17
Indicators 19
Using the Keyboard 21
Windows Keys 22
Hot Keys 23
Special Key 24
Using the System Utilities 25
System Utilities 31
Information 32
←→ Select Menu Ente 33
Advanced 34
Security 36
Setting a Password 37
Removing a Password 37
Changing a Password 38
BIOS Flash Utilities 43
DOS Flash Utility 44
Chapter 2 35 45
WinFlash Utility 46
Key in bios_pw 14452 0 48
40 Chapter 2 50
Disassembly Requirements 51
Chapter 3 51
General Information 52
Removing the Battery Pack 54
Removing the Lower Covers 55
46 Chapter 3 56
Removing the DIMM Modules 57
Removing the WLAN Module 58
Chapter 3 49 59
Chapter 3 51 61
Step Size Quantity Screw Type 61
HDD Carrier M3*3 4 61
Main Unit Disassembly Process 64
Removing the Switch Cover 65
56 Chapter 3 66
Removing the Keyboard 67
Removing the Antenna 68
Chapter 3 59 69
Removing the LCD Module 70
Removing the Upper Cover 72
64 Chapter 3 74
Removing the TouchPad Bracket 75
Removing the Speaker Modules 77
68 Chapter 3 78
Removing the Power Board 79
Removing the Modem Module 80
Removing the Main Board 81
72 Chapter 3 82
Removing the CPU Fan 83
Removing the Thermal Module 84
Removing the CPU 85
Removing the LCD Bezel 87
Removing the Inverter Board 88
Removing the Camera Module 89
Removing the LCD Panel 90
Removing the Antennas 92
Removing the MIC Module 93
Replacing the LCD Panel 94
Replacing the LCD Bezel 98
Replacing the CPU 99
Replacing the Thermal Module 99
Replacing the CPU Fan Module 100
Replacing the Mainboard 100
Replacing the Modem Module 101
Replacing the Power Board 102
Replacing the Speaker Module 103
94 Chapter 3 104
Replacing the Upper Case 105
Replacing the LCD Module 107
98 Chapter 3 108
Replacing the Antenna Cable 109
Replacing the Keyboard 110
Replacing the Switch Cover 111
Replacing the ODD Module 112
Chapter 3 103 113
Replacing the WLAN Module 114
Replacing the DIMM Modules 114
Replacing the Lower Covers 115
Replacing the Battery 116
Troubleshooting 117
Power On Issue 118
No Display Issue 119
Random Loss of BIOS Settings 120
LCD Failure 121
Built-In Keyboard Failure 121
TouchPad Failure 122
Internal Speaker Failure 122
Sound Problems 123
Internal Microphone Failure 124
HDD Not Operating Correctly 125
ODD Failure 126
Discs Do Not Play 127
Discs Do Not Burn Properly 127
Playback is Choppy 127
Drive Not Detected 128
Drive Read Failure 128
Modem Function Failure 129
Wireless Function Failure 129
Thermal Unit Failure 130
External Mouse Failure 130
Other Failures 131
Intermittent Problems 132
Undetermined Problems 132
Post Codes 133
BDS & Specific action: 134
Top View 139
Chapter 5 139
Bottom View 140
Clearing Password Check 141
BIOS Recovery by Crisis Disk 142
Chapter 6 143
Main Assembly 144
LCD Panel 145
136 Chapter 6 146
Chapter 6 137 147
138 Chapter 6 148
Chapter 6 139 149
Screw List 150
Chapter 6 141 151
Appendix A 152
Appendix A 148 158
149 Appendix A 159
Appendix A 150 160
151 Appendix A 161
Appendix A 152 162
Test Compatible Components 163
Microsoft 164
Vista Environment Test 164
160 Appendix B 170
Online Support Information 171
162 Appendix C 172

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