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2.7 Keyboard Troubleshooting
2.7
2 Troubleshooting Procedures
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 instructe d.
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 (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.
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.
34-pin
Keyboard
<System board>
CN3200
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 A50S /TECRA A3X Maintenance Manual (960-534)
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