Compal NBLB2, Service Manual

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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: CRT connection check

Procedure 2: CRT set check
7.1 Procedure 1 CRT connection check
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 CRT set check
The CRT set may be faulty. Perform Check 1
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.