Toshiba Satellite U300 Series Maintenance Manual page 93

Troubleshooting Procedures
Check 2 Modem cable may be faulty. Replace it with a new one. If the problem still occurs,
perform Check 3.
Check 3 MDC may be faulty. Replace it with a new one following the steps in Chapter 4. If
the problem still occurs, perform Check 4.
Check 4 Cable between MDC and system board may be faulty. Replace it with a new one
following the instructions in Chapter 4. If the problem still occurs, perform Check
5.
Check 6 System board may be faulty. Replace it with a new one following the instruction in
Chapter 4.
42 Satellite U300 and Satellite Pro U300 Maintenance Manual