Acer 4520 System Troubleshooting 65 Chapter 4 65, System Block Diagram and Board Layout 83 Chapter 5 83 83 , FRU (Field Replaceable Unit) List 87 Chapter 6 87, TravelMate 4520 Series Model Configurations 107 Appendix A 107

VIII
Table of Contents
Removing the LED Board 49
Removing the Fingerprint and Touchpad Boards 50
Removing the Card Reader Board 52
Removing the Bluetooth Board 53
Removing the System Board 54
Removing the Modem Board 55
Removing the Speakers 55
LCD Module Disassembly 57
LCD Module Disassembly Flowchart 57
Removing the LCD Bezel 58
Removing the Inverter Board 59
Removing the LCD Module Hinges 60
Removing the LCD Panel 60
Removing the LCD-CCD Cable 61
Removing the LCD Panel Brackets 62
Removing the Internal Microphone and the CCD Board 63
Removing the WLAN Antennas 64
Hardware Diagnostic Procedure 65
System Troubleshooting 65
Chapter 4 65
System Check Procedures 66
External Diskette Drive Check 66
External CD-ROM Drive Check 66
Keyboard or Auxiliary Input Device Check 66
Memory Check 67
Power System Check 67
Touchpad Check 68
POST Error Indicators 69
POST Error Message 69
POST Beep Codes 72
Index of Symptom-to-FRU Error Message 77
Intermittent Problems 80
Undetermined Problems 81
Online Support Info r matio n 82
System Block Diagram 83
System Block Diagram and Board Layout 83
Chapter 5 83
83 System Board Layout 84
Top View 84
Bottom View 85
System Switch 86
FRU (Field Replaceable Unit) List 87
Chapter 6 87
Aspire 5910 Exploded Diagram 88
TravelMate 4520 FRU List 89
TravelMate 4520 Series Model Configurations 107
Appendix A 107
Acer TM 4520 SG.book Page VIII Friday, June 22, 2007 5:43 PM