Toshiba QOSMIO F20

vi [CONFIDENTIAL] QOSMIO F20 Maintenance Manual (960-526)
Table of Contents
Chapter 1 Hardware Overview
1.1 Features ......................................................................................................................1-1
1.2 System Block Diagram..............................................................................................1-6
1.3 2.5-inch Hard Disk Drive.........................................................................................1-11
1.4 Optical Drive............................................................................................................1-16
1.5 Keyboard..................................................................................................................1-24
1.6 TFT Color Display...................................................................................................1-25
1.7 Power Supply...........................................................................................................1-27
1.8 Batteries ...................................................................................................................1-29
1.9 AC Adapter..............................................................................................................1-32
Chapter 2 Troubleshooting Procedures
2.1 Troubleshooting .........................................................................................................2-1
2.2 Troubleshooting Flowchart........................................................................................2-2
2.3 Power Supply Troubleshooting..................................................................................2-6
2.4 System Board Troubleshooting................................................................................2-16
2.5 USB FDD Troubleshooting .....................................................................................2-37
2.6 2.5” HDD Troubleshooting......................................................................................2-40
2.7 Keyboard Troubleshooting ......................................................................................2-45
2.8 Touch Pad Troubleshooting.....................................................................................2-46
2.9 Display Troubleshooting..........................................................................................2-47
2.10 Optical Drive Troubleshooting ................................................................................2-50
2.11 Modem Troubleshooting..........................................................................................2-51
2.12 LAN Troubleshooting..............................................................................................2-52
2.13 Wireless LAN Troubleshooting...............................................................................2-53
2.14 Sound Troubleshooting............................................................................................2-56
2.15 TV Tuner Troubleshooting ......................................................................................2-58