Keyboard Troubleshooting - Toshiba PORTEGE S100 Maintenance Manual

2.7 Keyboard Troubleshooting

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
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
The keyboard may be disconnected or damaged. Disassemble the computer following the
steps described in Chapter 4, Replacement Procedures, and perform the following checks:
Check 1
Check 2
Check 3
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Procedure 1: Diagnostic Test Program Execution Check
Procedure 2: Connector and Replacement Check
Diagnostic Test Program Execution Check
Connector and Replacement Check
Make sure the keyboard cable is securely connected to CN3230 on the system
board.
If the connection is loose, reconnect firmly and repeat Procedure 1. If there is still
an error, go to Check 2.
The keyboard or its cable 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.
The system board may be damaged. Replace it with a new one following the
instructions in Chapter 4, Replacement Procedures.
2 Troubleshooting Procedures
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