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External Module Disassembly Process 52
External Modules Disassembly Flowchart 52
Removing the Battery Pack 53
Removing the SD Dummy Card 54
Removing the Express Dummy Card 54
Removing the Lower Cover 55
Removing the DIMM 56
Removing the WLAN Board Module 57
Removing the Hard Disk Drive Module 58
Removing the Optical Drive Module 59
Main Unit Disassembly Process 61
Main Unit Disassembly Flowchart 61
Removing the CPU Heatsink Module 62
Removing the CPU 63
Removing the Keyboard 64
Removing the Middle Cover 65
Removing the Power Board 66
Removing the Media Board 67
Removing the LCD Module 68
Separating the Upper Case from the Lower Case 70
Removing the Speaker Modules 73
Removing the Launch Board 74
Removing the Touchpad Board Module 75
Removing the Bluetooth Board 77
Removing the USB board 78
Removing the Mainboard 79
Removing the Modem Board 81
Removing the RTC Battery 83
LCD Module Disassembly Process 85
LCD Module Disassembly Flowchart 85
Removing the LCD Bezel 86
Removing the Camera Board 87
Removing the Inverter Board 88
Removing the LCD with Brackets 89
Removing the LCD Brackets 91
Removing the LCD Module Hinges 92
Removing the Antennas 93
Removing the Microphones 94
Troubleshooting 97
System Check Procedures 98
External CD/DVD-ROM Drive Check 98
Keyboard or Auxiliary Input Device Check 98
Memory Check 98
Power System Check 99
Touchpad Check 100
Power-On Self-Test (POST) Error Message 101
Index of Error Messages 102
Phoenix BIOS Beep Codes 104
Index of Symptom-to-FRU Error Message 108
Intermittent Problems 111
Undetermined Problems 112
System Block Diagram and Connector Locations 113
System Block Diagram 113
SG_Aspire4920_Book.book Page viii Monday, May 28, 2007 6:49 PM
