Toshiba Portege M100 Maintenance Manual - Page 81

2.8 Display Troubleshooting 2 Troubleshooting Procedures 2.8 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 and Cable Check Procedure 4: Replacement Check Procedure 1 External Monitor Check 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 damaged. Go to Procedure 3. If the external monitor appears to have the same problem as the internal monitor, the system board may be damaged. 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 system board. Insert the Diagnostics disk in the computer's floppy disk drive, 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. PORTEGE M100 Maintenance Manual (960-452) 2-39