Toshiba PORTEGE R400 Maintenance Manual page 6

Table of Contents
Chapter 1 Hardware Overview
1.1 Features ...................................................................................................................... 1-1
1.2 1.8-inch Hard Disk Drive......................................................................................... 1-12
1.3 Keyboard.................................................................................................................. 1-14
1.4 TFT Color Display................................................................................................... 1-15
1.4.1 LCD Module ............................................................................................................ 1-15
1.5 Power Supply ........................................................................................................... 1-16
1.6 Batteries ................................................................................................................... 1-18
1.6.1 Main Battery ............................................................................................................ 1-18
1.6.2 RTC battery.............................................................................................................. 1-19
1.7 AC Adaptor.............................................................................................................. 1-20
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 ..................................................................................... 2-33
2.6 1.8-inch HDD Troubleshooting ............................................................................... 2-36
2.7 Keyboard and Touch pad Troubleshooting.............................................................. 2-41
2.8 Display Troubleshooting.......................................................................................... 2-43
2.9 LAN Troubleshooting.............................................................................................. 2-45
2.10 Bluetooth Troubleshooting ...................................................................................... 2-46
2.11 Wireless LAN Troubleshooting............................................................................... 2-48
2.12 3G Troubleshooting ................................................................................................. 2-50
2.13 Tablet Pen Troubleshooting..................................................................................... 2-53
2.14 Sound Troubleshooting............................................................................................ 2-55
2.15 Fingerprint sensor Troubleshooting......................................................................... 2-58
vi [CONFIDENTIAL] PORTÉGÉ R400 Maintenance Manual (960-623)