Toshiba M70 User Manual

[CONFIDENTIAL]         

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This section describes how to determine if the computer's modem is functioning properly. Figure 
2-12 outlines the process. Perform the steps below starting with Procedure 1 and continuing with 
the other procedures as required. 
 

Procedure 1:  Telephone line connection check 

Procedure 2:  Modem card connection check 

Procedure 3:  Modem card replacement check 

The telepho ne cable may be damaged or the connections may be loose. Attempt to connect the 
computer to a network through using the modem. If the modem does not function at all, go to 
Procedure 3. If the attempt fails because the computer detects no telephone signal, the fault may 
be in the telephone cable, the wall socket or the modem port. Perform Check 1: 
 
Check 1 

Make sure telephone cable is firmly plugged into both the telephone wall socket and 
the modem port of the computer. If the cable is connected correctly, go to Check 2. 

Check 2 

Make sure the modem port is firmly secured to the system board of the computer. If 
the malfunction remains, go to Check 3. 

Check 3 

The telephone cable may be damaged. Replace with a good cable. If the malfunction 
remains, go to Procedure 2. 

Disassemble the computer following the steps described in Chapter 4, Replacement Procedures 
and ensure that the modem card is well connected to the system board. If the problem persists, 
perform Procedure 3. 

The modem card or RJ-11 jack may be faulty. Try replacing them. If the problem persists, the 
system board may be defective or damaged.  Replace the System Board with a new one 
following the steps in Chapter 4, Replacement Procedures.