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2.8
Display Troubleshooting
This section describes how to determine if the computer's display is functioning properly.
Start with Procedure 1 and continue with the other procedures as instructed.
Procedure 1:
Procedure 2:
Procedure 3:
Procedure 4:
Procedure 1
External Monitor Check
Connect the external monitor to the computer's external monitor port, then boot the com-
puter. If there is no display on the external monitor, press Fn + F5 to change the setup
display setting to external or simultaneous.
If the external monitor works correctly, the internal LCD display may be damaged. Go to
Procedure 3.
If the external monitor appears to have the same problem as the internal LCD, the display
controller may be damaged. Go to Procedure 2.
Procedure 2
Diagnostic Test Program Execution Check
The Display Test program is stored on the computer's Diagnostics Disk. This program
checks the display controller on the system board. Insert the Diagnostics Disk in the
computer's floppy disk drive, turn on the computer, and run the test. Refer to Chapter 3,
Tests and Diagnostics, for details.
If an error is detected, go to Procedure 3. If an error is not detected, the display is functioning
properly.
650CT
External Monitor Check
Diagnostic Test Program Execution Check
Connector Check
Replacement Check
2-31
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Table of Contents
Troubleshooting
