Display Troubleshooting - Toshiba T1960CT Maintenance Manual

2.8

Display Troubleshooting

This section describes how to determine if the T1960CS/T1960CT'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 5:
Procedure 1 Contrast Control Check (T1960CS only)
Contrast is changed with the contrast dial. If the contrast does not change when you turn the
dial, perform Procedure 2.
Procedure 2 External CRT Check
Connect the external CRT to the T1960CS/T1960CT's external monitor port, then boot the
computer. The computer 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 Proce-
dure 4.
If the external CRT appears to have the same problem as the internal LCD, the display con-
troller may be damaged. Go to Procedure 3.
Procedure 3 Diagnostic Test Program Execution Check
The Display Test program is stored on the T1960CS/T1960CT Diagnostic Disk. This pro-
gram checks the display controller on the system board. After loading Toshiba MS-DOS, run
the Diagnostic 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.
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Contrast Control Check (T1960CS only)
External CRT Check
Diagnostic Test Program Execution Check
Connector Check
Replacement Check
T1960CS/T1960CT