JHL90 Service Manual
This section describes how to determine if the computer’s modem is functioning
properly. Figure 6-11 outlines the process. Perform the steps below starting wi
Procedure 1 and continuing with the other procedures as required.
th
nnection check
check
12.1
ons may be loose. Attempt
attempt fails because the
computer detects no telephone signal, the fault may be in the telephone cable, the
mo
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.
12.2 Procedure 2 Modem card connection check
Disassemble the computer following the steps described Replacement Procedures
and ensure that the modem card is well connected to the system board. If the
problem persists, perform Procedure 3.
12.3 Procedure 3 Modem replacement check
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
Replacement Procedures.
• Procedure 1: Telephone line co
• Procedure 2: Modem card connection check
• Procedure 3: Modem card replacement
Procedure 1 Telephone line connection check
The telephone cable may be damaged or the connecti
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
wall socket or the dem 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.
•
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