2 Troubleshooting Procedures
Satellite U840
Maintenance Manual (960-Q08)
24
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.
Содержание Satellite U840 Series
Страница 1: ...Satellite U840 Maintenance Manual 960 Q08 Chapter 1 Hardware Overview ...
Страница 18: ...Chapter 1 Hardware Overview Satellite U840 Maintenance Manual 960 Q08 15 ...
Страница 24: ...2 1 Satellite U840 Maintenance Manual 960 Q08 Chapter 2 Troubleshooting Procedures ...
Страница 63: ...Test Program for Field Satellite U840 Tests and Diagnostics Manual 1 Chapter 3 Diagnostic Programs ...
Страница 190: ...Satellite U840 Maintenance Manual 960 Q08 Appendix B Appendix B Board Layout B 1 System Board ...
Страница 191: ...Board Layout Satellite U840 Maintenance Manual 960 Q08 Figure B 1 System board layout Front 02 01 03 04 05 06 07 08 09 ...