Toshiba Satellite A350 Maintenance Manual - Page 103
Procedure 1, Sensor button connection check, Logic Upper replacement check
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672 Troubleshooting Procedures 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 unit or FFC may be defective or damaged. Replace each with a new 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. Satellite A350, SATEGO A350, EQUIUM A350 Series Maintenance Manual 67