Table of Contents
Chapter 1 Hardware Overview
1.1 Features ...................................................................................................................... 1-1
1.2 System Block Diagram .............................................................................................. 1-5
1.3 2.5-inch Hard Disk Drive......................................................................................... 1-10
1.4 Optical Drive............................................................................................................ 1-15
1.5 Keyboard.................................................................................................................. 1-14
1.6 TFT Color Display................................................................................................... 1-15
1.7 Power Supply ........................................................................................................... 1-17
1.8 Batteries ................................................................................................................... 1-20
1.9 AC Adapter .............................................................................................................. 1-23
Chapter 2 Troubleshooting Procedures
2.1 Troubleshooting ......................................................................................................... 2-1
2.2 Troubleshooting Flowchart........................................................................................ 2-3
2.3 Power Supply Troubleshooting.................................................................................. 2-7
2.4 System Board Troubleshooting................................................................................ 2-17
2.5 USB FDD Troubleshooting ..................................................................................... 2-37
2.6 2.5” HDD Troubleshooting...................................................................................... 2-41
2.7 Keyboard Troubleshooting ...................................................................................... 2-46
2.8 Touch pad Troubleshooting ..................................................................................... 2-48
2.9 Display Troubleshooting.......................................................................................... 2-50
2.10 Optical Disk Drive Troubleshooting........................................................................ 2-53
2.11 Modem Troubleshooting.......................................................................................... 2-55
2.12 LAN Troubleshooting.............................................................................................. 2-57
2.13 Wireless LAN Troubleshooting............................................................................... 2-58
2.14 Bluetooth Troubleshooting ...................................................................................... 2-61
2.15 Sound Troubleshooting............................................................................................ 2-64
2.16 TV Tuner Troubleshooting ...................................................................................... 2-66
vi [CONFIDENTIAL] QOSMIO G20 Maintenance Manual (960-511)
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