Display Troubleshooting - Toshiba T3400 Maintenance Manual

2.8

Display Troubleshooting

This section describes how to determine if the display is functioning properly. Start with
Procedure 1 and continue as instructed.
Procedure 1:
Procedure 2:
Procedure 3:
Procedure 4:
Procedure 1 External Monitor Check
Connect the external monitor adapter to the computer port replicator port and external moni-
tor to the external monitor adapter, then boot the computer. The computer automatically
detects the external monitor even if Resume mode is enabled.
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 T3400/T3400CT Diagnostic Disk. This program
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 3. If an error is not detected, the display is function-
ing properly.
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External Monitor Check
Diagnostic Test Program Execution Check
Connector Check
Replacement Check
T3400/T3400CT Maintenance Manual