2 Troubleshooting Procedures
Procedure 2
Connector Check and Replacement Check
The Modem is installed as a MDC (Modem Daughter Card). If the modem malfunctions,
there may be a bad connection between the MDC and the system board. Or the MDC, system
board or their connectors might be damaged.
Disassemble the computer following the steps described in Chapter 4,
Replacement
Procedures
and perform the following checks:
Check 1
Make sure the MDC is firmly connected to CN3010 on the system board and the
Modem cable is firmly connected to the Modem jack.
If connections are disconnected, connect them firmly and repeat Procedure 1. If
the modem is still not functioning properly, perform Check 2.
Check 2
The MDC may be defective or damaged. Replace it with a new one following the
steps in Chapter 4,
Replacement Procedures
. If the modem is still not functioning
properly, perform Check 3.
Check 3
The MDC cable may be defective or damaged. Replace it with a new one
following the steps in Chapter 4,
Replacement Procedures
. If the modem is still
not functioning properly, perform Check 4.
Check 4
The system board may be defective or damaged. Replace it with a new one
following the steps in Chapter 4,
Replacement Procedures
.
PORTEGE R300 Maintenance Manual (960-591)
[CONFIDENTIAL]
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Summary of Contents for PORTEGE R300
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Page 11: ... CONFIDENTIAL Chapter 1 Hardware Overview ...
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Page 39: ... CONFIDENTIAL Chapter 2 Troubleshooting Procedures ...
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Page 115: ... CONFIDENTIAL Chapter 3 Tests and Diagnostics ...
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Page 227: ...Chapter 4 Replacement Procedures CONFIDENTIAL ...
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Page 281: ... CONFIDENTIAL Appendices ...
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Page 342: ...Appendices Appendix E Key Layout E 2 CONFIDENTIAL PORTEGE R300 Maintenance Manual 960 591 ...
Page 352: ...Appendices Appendix I Reliability I 2 CONFIDENTIAL PORTEGE R300 Maintenance Manual 960 591 ...