Display Troubleshooting; Procedure 1 External Monitor Check; Procedure 2 Diagnostic Test Program Execution Check - Toshiba QOSMIO G40 Maintenance Manual

2 Troubleshooting Procedures
2.9

Display Troubleshooting

To check if the computer's display is malfunctioning or not, follow the troubleshooting
procedures below as instructed.
Procedure 1
Connect an external monitor to the computer's external monitor port, then boot the computer.
The computer automatically detects the external monitor.
If the external monitor works correctly, the internal LCD may be faulty. Go to Procedure 3.
If the external monitor appears to have the same problem as the internal monitor, system
board may be faulty. Go to Procedure 2.
Procedure 2
The Display Test program is stored in Diagnostics disk. This program checks the display
controller on system board. Insert the Diagnostics disk in the USB FDD, 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.
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Procedure 1: External Monitor Check
Procedure 2: Diagnostic Test Program Execution Check
Procedure 3: Connector and Cable Check
Procedure 4: Replacement Check
External Monitor Check
Diagnostic Test Program Execution Check
[CONFIDENTIAL]

2.9 Display Troubleshooting

QOSMIO G40 Maintenance Manual (960-632)