Toshiba PORTEGE R400 Maintenance Manual page 44

2 Troubleshooting Procedures
If the diagnostics program cannot detect an error, the problem may be intermittent. The
Running Test program should be executed several times to isolate the problem. Check the
Log Utilities function to confirm which diagnostic test detected an error, then perform the
appropriate troubleshooting procedures as follows:
1. If an error is detected on the system test, memory test, display test, expansion test,
real timer test, Sound/LAN/Modem test, Bluetooth test, perform the System Board
Troubleshooting Procedures in Section 2.4.
2. If an error is detected on the floppy disk test, perform the USB FDD Troubleshooting
Procedures in Section 2.5.
3. If an error is detected on the hard disk test, perform the HDD Troubleshooting
Procedures in Section 2.6.
4. If an error is detected on the keyboard test (DIAGNOSTICS TEST) and pressed key
display test (ONLY ONE TEST), perform the Keyboard/Touch pad Troubleshooting
Procedures in Section 2.7.
5. If an error is detected on the display test, perform the Display Troubleshooting
Procedures in Section 2.8.
6. If an error is detected on the LAN test, perform the LAN Troubleshooting Procedures
in Section 2.9.
7. If an error is detected on the Bluetooth test, perform the Bluetooth Troubleshooting
Procedures in Section 2.10.
8. If an error is detected on the Wireless LAN test, perform the Wireless LAN
Troubleshooting Procedures in Section 2.11.
9. If an error is detected on the 3G test, perform the 3G Troubleshooting Procedures in
Section 2.12.
10. If an error is detected on the Tablet Pen test, perform the Tablet Pen Troubleshooting
Procedures in Section 2.13.
11. If an error is detected on the Sound test, perform the Sound Troubleshooting
Procedures in Section 2.14.
12. If a malfunction is detected on Fingerprint sensor, perform the Fingerprint sensor
Troubleshooting Procedures in Section 2.15.
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