Toshiba Tecra A2-S239 Maintenance Manual - Page 94

2 Troubleshooting Procedures 2.8 Display Troubleshooting 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: Diagnostic Test Program Execution Check Procedure 2: Connector and Cable Check Procedure 3: Replacement Check Procedure 1 Diagnostic Test Program Execution Check The Display Test program is stored on the Diagnostics disk. 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. This program checks the display controller on the system board. If an error is detected, go to Procedure 3. Procedure 2 Connector and Cable Check The LCD module is connected to the system board through the LCD harness. The cable may be disconnected from the board or damaged. Disassemble the computer following the steps described in Chapter 4, Replacement Procedures. Check that the pin of the LCD I/F connector is not bent or broken. If the connection is loose, reconnect firmly and repeat Procedure 2. If there is still an error, go to Procedure 3. 2-40 Satellite A50/TECRA A2 Maintenance Manual (960-478)