Display Troubleshooting; Procedure 1 External Monitor Check; Procedure 2 Diagnostic Test Program Execution Check; Procedure 3 Connector Check And Cable Check - Toshiba Satellite U500 Maintenance Manual

2 Troubleshooting Procedures
2.7

Display Troubleshooting

This section describes how to determine if the computer's display is functioning properly.
Start with Procedure 1 and continue with the other procedures as instructed.
Procedure 1: External Monitor Check
Procedure 2: Diagnostic Test Program Execution Check
Procedure 3: Connector Check and Cable Check
Procedure 4: Replacement Check
Procedure 1 External Monitor Check
Connect an external monitor and turn on the computer. If there is no problem on it, the
internal LCD may be defective. Go to Procedure 3. If there is any problem on the external
monitor, the main board may be defective. Go to Procedure 2.
Procedure 2 Diagnostic Test Program Execution Check
The Display Test program is stored on the computer's Diagnostics disk. This program checks
the display controller on the main board. Connect the Diagnostics disk, 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.
Procedure 3 Connector Check and Cable Check
Check 1 The LCD and Main board are connected by inverter cable, inverter board and
LVDS cable. Make sure the LVDS cable is firmly connected to Main board. If
the connection is loose, reconnect firmly and restart the computer. If there is still
an error, go to Check 2.
2-32 [CONFIDENTIAL] Satellite M500D/M505D/M507D Maintenance Manual