Acer Aspire 4920 Service Guide - Page 8

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