Toshiba Satellite A350D

872 Troubleshooting Procedures

Satellite A350D/A355D, SATEGO A350D, EQUIUM A350D Series Maintenance Manual

To determine if the computer’s built-in Sensor button is functioning properly, perform the

following procedures. Figure 2-25 outlines the process. Start with Procedure 1 and continue

as instructed.

Procedure 1: Sensor button connection check

Procedure 2: Logic upper replacement check

Procedure 1 Sensor button connection check

The Sensor button is connected via the Sensor button FFC to the system board. Make sure the

Sensor button FFC cable is firmly connected to the Sensor button and system board. Refer to

Chapter 4, Replacement Procedures, for instructions on how to disassemble the computer and

then perform the following checks.

If any of the connections are loose, reconnect firmly. If any of the connections is damaged, or

there is still an error, go to Procedure 2.

Procedure 2 Logic upper replacement check

The Sensor button board or FFC may be defective or damaged. Replace each with a new one

Logic upper following the steps in Chapter 4. If the Sensor button is still not functioning

properly, replace the system board with a new one following the steps in Chapter 4.