Procedure 1 Diagnostic Test Program Execution Check; Procedure 2 Connector Check And Replacement Check; Modem Troubleshooting; Procedure 1 - Toshiba Satellite U400 Maintenance Manual

2.11 Modem Troubleshooting

To check if modem is malfunctioning or not, follow the troubleshooting procedures below as
instructed.

Procedure 1:

Procedure 2:

Procedure 1

Execute Modem test in the LAN/Modem/Bluetooth/IEEE1394 test program. Refer to Chapter
3, Tests and Diagnostics for more information on how to perform the test program.
If any error is detected, perform Procedure 2.
Procedure 2
MDC (Modem Daughter Card) is used as the modem for this computer. MDC is connected to
system board by connector CN31(Santa Rosa) or CN29(NAPA). And also, MDC is connected
to system and LAN board by modem cable. If modem malfunctions, the connection of cable,
board and module may be defective. Otherwise, they may be faulty.
Disassemble the computer following the steps described in Chapter 4 and perform the
following checks:
Satellite U400/Satellite Pro U400/PORTEGE M800 Maintenance Manual
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Diagnostic Test Program Execution Check

Connector Check and Replacement Check

Diagnostic Test Program Execution Check
Connector Check and Replacement Check
Chapter2Troubleshooting Procedures
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