Toshiba Satellite Maintenance Manual page 55

2 Troubleshooting Procedures
To determine if the computer's keyboard is functioning properly, perform the following
procedures. Figure 2-4 outlines the process. Start with Procedure 1 and continue with the
other procedures as instructed.
Procedure 1: Diagnostic check
Procedure 2: Connector and replacement check
Procedure 1 Diagnostic check
test and Diagnostics
Run the
Tests and Diagnostics
Refer to Chapter 3,
If an error is located, go to Procedure 2. If an error does not occur, the keyboard is
functioning ok.
Procedure 2 Connector and replacement check
The keyboard and/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.
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.
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.
SatelliteA660/ProA660 Series Maintenance Manual
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Program, which will automatically execute the Keyboard Test.
for more information on how to run the program.