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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 HDD, 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 the LVDS cable. Check the
connections. The connectors may be disconnected or damaged. Disassemble the
computer following the steps described in Chapter 4, Replacement Procedures.
Satellite M500/M505/M507 Maintenance Manual [CONFIDENTIAL] 2-31