110 Series 2-25
2.8 Display and VGA Board Troubleshooting
This section describes how to determine if the display is functioning properly. Start with
Procedure 1 and continue with the other procedures as instructed.
Procedure 1: Contrast Control Check
Procedure 2: External CRT Check
Procedure 3: Diagnostic Test Program Execution Check
Procedure 4: Connector Check
Procedure 5: Replacement Check
Procedure 1 Contrast Control Check
Use the contrast dial to change the contrast. If the display is blank, go to Check 1. If you
cannot change the contrast, go to Check 3.
If the contrast does not change when you turn the contrast dial, perform Procedure 2.
Procedure 2 External CRT Check
Connect the external CRT to the external monitor port, then boot the computer. The com-
puter automatically detects the external CRT even if Resume mode is enabled.
If the external CRT works correctly, the internal LCD display may be damaged. Go to
Procedure 4.
If the external CRT appears to have the same problem as the internal LCD, the display
controller may be damaged. Go to Procedure 3.
Procedure 3 Diagnostic Test Program Execution Check
The Display Test program is stored on the computer Diagnostics Disk. This program checks
the display controller on the system board. After loading Toshiba MS-DOS, run the Diag-
nostics Program. Refer to Chapter 3, Tests and Diagnostics, for details.
If an error is detected, go to Procedure 4. If an error is not detected, the display is function-
ing properly.
To Next Page
Loading...
