Compal JHT01 - Procedure 1 Telephone Line Connection Check; Procedure 2 Modem Card Connection Check; Procedure 3 Modem Replacement Check

JHT01 Service Manual
6-29
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 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
12.1 Procedure 1 Telephone line connection check
The telephone 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.
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.