Display Troubleshooting - Toshiba T6600C User Manual

2.8

Display Troubleshooting

This section describes how to determine if the T6600C'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
The T6600C display contrast is controlled by the contrast dial, which is located on the right
side of the display.
Make sure the contrast dial is adjusted correctly. 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 T6600C's external monitor port, then boot the computer.
The computer automatically detects the external CRT.
If the external CRT works correctly, the internal LCD display may be damaged. Go to
Procedure 3.
If the external CRT appears to have the same problem as the internal LCD, the display
controller or connection between the display and system board may be damaged. Go to
Procedure 4.
Procedure 3 Diagnostic Test Program Execution Check
The Display Test program is stored on the T6600C Diagnostics Disk. This program checks
the display controller on the system board. After loading Toshiba MS-DOS, run the Diagnos-
tics 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
External CRT Check
Diagnostic Test Program Execution Check
Connector Check
Replacement Check
T6600C, T6600C/CD, T6600C/CDV