Keyboard Troubleshooting; Procedure 1 Diagnostic Test Program Execution Check; Procedure 2 Connector Check And Replacement Check - Toshiba Satellite U840 Maintenance Manual

2.7 Keyboard Troubleshooting

The keyboard include the LED backlight. 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, check if the LED backlight is lighted . 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 U840 Maintenance Manual (960-Q08)
2 Troubleshooting Procedures
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