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2 Troubleshooting Procedures 2.5 Keyboard Troubleshooting
To determine if the computer’s keyboard is functioning properly, perform the following
procedures. Figure 2-5 outlines the process. Start with Procedure 1 and continue with the other
procedures as instructed.
Procedure 1: External keyboard check
Procedure 2: Diagnostic check
Procedure 3: Connector and replacement check
Procedure 1 External keyboard check
Connect a USB keyboard to one of the computer’s USB ports, then boot the computer. The
computer automatically detects the external keyboard.
If the external keyboard works correctly, the internal keyboard or its connections may be faulty.
Go to Procedure 2.
If the external keyboard appears to have the same problem as the internal keyboard, the system
board may be damaged. Replace it with a new one following the instructions in Chapter 4.
Procedure 2 Diagnostic check
Run the Diagnostic Program, which will automatically execute the Keyboard Test. Refer to
Chapter 3, Tests and Diagnostics for more information on how to run the program.
If an error is located, go to Procedure 3. If an error does not occur, the keyboard is functioning
properly.
2-16 Satellite A30 Series Maintenance Manual