Chapter2 Troubleshooting Procedures
Satellite U400/Satellite Pro U400/PORTEGE M800
Maintenance Manual 2-21
Procedure 3 Diagnostic Test Program Execution Check
Execute the following tests from the Diagnostic Test Menu. These tests check the system
board. Refer to Chapter 3, Tests and Diagnostic, for more information on how to perform
these tests.
1. System test
2. Memory test
3. Keyboard test
4. Display test
5. Floppy Disk test
6. VGA test
7. VGA Memory test
8. Hard Disk test
9. CPU Temperature test
10. Main Battery test
11. BIOS test
12. CD-ROM/DVD-ROM test
13. System Status LED test
14. Wireless LAN test
15. LAN/Modem/Sound test
16. UUID test-DMI Information (Write DMI)
If an error is detected during these tests, go to Procedure 4.
Procedure 4 Replacement Check
System board may be faulty. Disassemble the computer following the steps described in
Chapter 4, Replacement Procedures and replace system board with a new one.
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