Keyboard Troubleshooting; Procedure 1 Diagnostic Test Program Execution Check; Procedure 2 Connector Check And Replacement Check; Procedure 4 Diagnostic Test Program Execution Check - Toshiba Satellite U400 Maintenance Manual

2.7 Keyboard Troubleshooting

To check if the computer's keyboard is malfunctioning or not, follow the troubleshooting
procedures below as instructed.
Procedure 1: Diagnostic Test Program Execution Check
Procedure 2: Connector and Replacement Check

Procedure 1

Diagnostic Test Program Execution Check
Execute the Keyboard Test (DIAGNOSTIC TEST) and Pressed key display test (ONLY
ONE 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, keyboard is functioning
properly.
Satellite U400/Satellite Pro U400/PORTEGE M800 Maintenance Manual
Chapter2 Troubleshooting Procedures
2-31