Toshiba PORTEGE R400 Maintenance Manual page 39

2.1 Troubleshooting
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. Power Supply
2. System Board
3. USB Floppy Disk Drive
4. 1.8-inch Hard Disk Drive
5. Keyboard/Touch pad
6. Display
7. LAN
The Test Program operations are described in Chapter 3. Detailed replacement procedures
are described in Chapter 4.
NOTE: Before replacing the system board, it is necessary to execute the subtest 03 DMI
Information save of the 3.3 Setting of the hardware configuration in Chapter 3.
After replacing the system board, it is necessary to execute the subtest 04 DMI
Information recovery and subtest 08 System configuration display of the 3.3
Setting of the hardware configuration in Chapter 3.
Also update with the latest EC/KBC as described in Appendix H "EC/KBC
Rewrite Procedures".
The implement for the Diagnostics procedures is referred to Chapter 3. Also, following
implements are necessary:
1. Phillips screwdrivers (For replacement procedures, Refer to Chapter 4)
2. Implements for debugging port check
•
Toshiba DOS system FD
•
RS-232C cross cable
•
Test board with debug port test cable
•
PC for displaying debug port test result
PORTEGE R400 Maintenance Manual (960-623)
2 Troubleshooting Procedures
8. Bluetooth
9. Wireless LAN
10. 3G
11. Tablet pen
12. Sound components
13. Fingerprint sensor
[CONFIDENTIAL] 2-1