Troubleshooting Introduction - Toshiba M645-S4080 Maintenance Manual

2 Troubleshooting Procedures
Chapter 2 describes how to determine if a Field Replaceable Unit (FRU) in the computer is
causing the computer to malfunction. The FRUs covered are:
1. Display
2. Keyboard
3. USB ports
4. Sleep & Charge
5. Touch Pad
6. Speaker
The Diagnostics Disk operations are described in Chapter 3. Detailed replacement
procedures are given in Chapter 4.
The following tools are necessary for implementing the troubleshooting procedures:
1. Phillips screwdriver (3.5 mm)
2. 2DD or 2HD formatted work disk for floppy disk drive testing
3. Express card
4. Multimeter
5. External monitor
6. USB compatible keyboard
7. Multimedia sound system with line-in and line-out ports
8. Headphones
9. USB test module and USB cable
10. Music CD
11. MIC module and MIC line
12. Audio loopback
13. Finger print module
14. E-SATA HDD
15. HDMI
16. CRT
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2.1

Troubleshooting Introduction

7. Optical driver
8. Modem
9. Express card
10.Wireless LAN
11.Camera
12.Bluetooth
13. HDMI CEC
14. MIC
15. Finger printer
16. E-SATA
17. 3G(GPS)
18. Sleep & Play music
19. 3D Sensor
20. Light Sensor
21. Bridge Media
22. HDD/SSD
.23. LAN
3