Toshiba A40 manual Troubleshooting Procedures Keyboard Troubleshooting

2 Troubleshooting Procedures 2.7 Keyboard Troubleshooting

Procedure 2 Connector and Replacement Check

The keyboard, PAD I/F and PAD Switch may be disconnected or damaged. Disassemble the computer following the steps described in Chapter 4, Replacement Procedures, and perform the following checks:

1.If the keyboard malfunctions, start with Check 1.

2.If the PAD switch malfunctions, start with Check 3.

Check 1 Make sure the keyboard cable is securely 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 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 5.

Check 3 Make sure the PAD cable is firmly connected to the system board.

If the connection is loose, reconnect firmly and repeat Procedure 2. If there is still an error, go to Check 4.

Check 4 The PAD switch board or PAD switch 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 5.

Check 5 The system board may be damaged. Replace it with a new one following the instructions in Chapter 4, Replacement Procedures.

2-44 Satellite A40 Maintenance Manual (960-458)