Procedure 1 Crt Connection Check; Procedure 2 Crt Set Check - Compal JHL90 Service Manual

JHL90 Service Manual
To determine if the computer's CRT port is functioning properly, perform the
following procedures. Figure 6-6 outlines the process. Start with Procedure 1 and
continue as instructed.
• Procedure 1:
• Procedure 2:
7.1 Procedure 1
The CRT cable may be damaged or the connections may be loose. Perform
Check 1:
Check 1
Make sure CRT cable is firmly plugged into both the CRT set and the CRT port of
the computer.
• If the cable is connected correctly, go to Check 2.
Check 2
Make sure the CRT port is firmly secured to the system board of the computer.
• If the malfunction remains, go to Check 3.
Check 3
The CRT cable may be damaged. Replace with a good cable.
• If the malfunction remains, go to Procedure 2
7.2 Procedure 2
The CRT set may be faulty. Perfor
Check 1
Try using the set for CRT reception.
• If it does not work, the set may be damaged.
• If the set does work, perform Check 2.
Check 2
Try connecting a different CRT to the computer.
• If the replacement television works, the original set may be damaged.
• If the replacement set does not work the system board may be damaged.
6-18
CRT connection check
CRT set check
CRT connection check
CRT set check
m Check 1