vi [CONFIDENTIAL] TECRA M4 Maintenance Manual (960-521)
Table of Contents Chapter 1 Hardware Overview
1.1 Features ......................................................................................................................1-1
1.2 2.5-inch Hard Disk Drive......................................................................................... 1-11
1.3 Optical Drive............................................................................................................1-13
1.4 Keyboard.................................................................................................................. 1-26
1.5 TFT Color Display...................................................................................................1-27
1.6 Power Supply........................................................................................................... 1-29
1.7 Batteries................................................................................................................... 1-32
1.8 AC Adapter.............................................................................................................. 1-35
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................................................................................ 2-17
2.5 USB 3.5” FDD Troubleshooting.............................................................................. 2-33
2.6 2.5” HDD Troubleshooting...................................................................................... 2-36
2.7 Keyboard Troubleshooting ...................................................................................... 2-41
2.8 Display Troubleshooting.......................................................................................... 2-42
2.9 Touch Pad Troubleshooting .....................................................................................2-44
2.10 Selectable bay(optical drive) Troubleshooting........................................................2-45
2.11 Modem Troubleshooting..........................................................................................2-46
2.12 Bluetooth Troubleshooting ......................................................................................2-47
2.13 LAN Troubleshooting.............................................................................................. 2-50
2.14 Sound Troubleshooting............................................................................................ 2-51
2.15 SD Card Slot Troubleshooting.................................................................................2-52
2.16 Tablet Pen Troubleshooting..................................................................................... 2-53