Keyboard; Procedure 1 Test Program Check; Procedure 2 Connector Check And Replacement Check - Toshiba Satellite C650D Maintenance Manual

2 Troubleshooting

2.6 Keyboard

To check if the computer's keyboard is defective or malfunctioning, follow the troubleshooting
procedures below as instructed.

Procedure 1 Test Program Check

Procedure 2 Connector Check and Replacement Check

Procedure 1 Test Program Check

Execute the Keyboard test available as part of the maintenance test program. See Chapter 3 for
information on how to perform the test.
If an error is detected in the test, go to Procedure 2. If no error is detected, the keyboard itself is
normal.

Procedure 2 Connector Check and Replacement Check

The keyboard or system board may be disconnected or faulty. Disassemble the computer
following the steps described in Chapter 4 and perform the following checks:
Check 1 Make sure the keyboard cable has been firmly connected to the system board.

Keyboard

If the cable is loose or off, reconnect it firmly and return to Procedure 1. If
there is still an error, perform Check 2.
Check 2 The keyboard may be faulty. Replace it with a new one following the
instructions in Chapter 4. If the problem persists, perform Check 3.
Check 3 The System board may be faulty. Replace it with a new one following the
instructions in Chapter 4. If the keyboard is still not functioning properly,
perform Check 4.
Check 4 The memory may be defective. Replace the memory module with a new one
following the steps described in Chapter 4. If the problem persists, perform
Check 5.
Check 5 The CPU may be faulty. Disassemble the computer following the steps
described in Chapter 4 and replace the CPU with a new one.
Satellite/Satellite Pro/C650D/C655D
System board
Maintenance Manual
2.6 Keyboard
CPU
2-14