Toshiba Tecra A2-S239 Maintenance Manual - Page 93

2.7 Keyboard Troubleshooting 2 Troubleshooting Procedures 2.7 Keyboard Troubleshooting To determine if the computer's keyboard is functioning properly, perform the following procedures. Start with Procedure 1 and continue with the other procedures as instructed. Procedure 1: Diagnostic Test Program Execution Check Procedure 2: Connector Check and Replacement Check Procedure 1 Diagnostic Test Program Execution Check Execute the Keyboard Test in the Diagnostic Program. Refer to Chapter 3, Tests and Diagnostics for more information on how to perform the test program. If an error occurs, go to Procedure 2. If an error does not occur, the keyboard is functioning properly. Procedure 2 Connector Check and Replacement Check The keyboard or system board may be disconnected or damaged. Disassemble the computer following the steps described in Chapter 4, Replacement Procedures and perform the following checks: Check 1 Make sure the keyboard cable is firmly connected to the system board. If the connection is loose, reconnect firmly and repeat Procedure 1. If there is still an error, go to Check 2. Check 2 The keyboard may be damaged. Replace it with a new one following the instructions in Chapter 4, Replacement Procedures. If the problem still exists, perform Check 3. Check 3 The system board may be damaged. Replace it with a new one following the instructions in Chapter 4, Replacement Procedures. Satellite A50/TECRA A2 Maintenance Manual (960-478) 2-39