Toshiba PORTEGE M300 - page 97

2 Troubleshooting Procedures 2.11 Modem Troubleshooting
PORTEGE M300 Maintenance Manual (960-504) 2-47
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 MDC harness may be faulty. Replace it with a new one following the instructions
in Chapter 4. If the problem still occurs, perform Check 5.
Check 5 System board may be faulty. Replace it with a new one following the instruction
in Chapter 4.