2 Troubleshooting Procedures 2.1 Troubleshooting
2
2.1 Troubleshooting Chapter 2 describes how to determine which Field Replaceable Unit (FRU) in the computer is
causing the computer to malfunction. (The “FRU” means the replaceable unit in the field.)
The FRUs covered are:
1. Power supply 7. Display 13. Sound
2. System Board 8. Optical Disk Drive 14. TV Tuner
3. USB FDD 9. Modem 15. Bridge Media slot
4. 2.5” HDD 10. LAN 16. PCI ExpressCard slot
5. Keyboard 11. Wireless LAN
6. Touch pad 12. Bluetooth
The Test Program operations are described in Chapter 3. Detailed replacement procedures are
described in Chapter 4.
NOTE: After replacing the system board or CPU, it is necessary to execute the subtest 01
initial configuration of the 3.3 Setting of the hardware configuration in Chapter 3.
Also update with the latest BIOS as described in Appendix G “BIOS Rewrite
Procedures”
After replacing the LCD, update with the latest EC/KBC as described in Appendix
H “EC/KBC Rewrite Procedures” to set the SVP parameter.
The implement for the Diagnostics procedures is referred to Chapter 3. Also, following
implements are necessary:
1. Phillips screwdrivers (For replacement procedures)
2. Implements for debugging port check
Toshiba MS-DOS system FD •
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RS-232C cross cable
Test board with debug port test cable
PC for displaying debug port test result
QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] 2-1