2.7 Keyboard | 2 Troubleshooting |
2.6Keyboard
To check if the computer’s keyboard is defective or malfunctioning, follow the troubleshooting procedures below as instructed.
Procedure 1 External Keyboard Check
Procedure 2 Test Program Check
Procedure 3 Connector Check and Replacement Check
Procedure 1 External Keyboard Check
Connect a PS/2 or compatible keyboard to the computer's PS/2 keyboard/mouse port, then boot the computer. The computer automatically detects the external keyboard even if resume mode is enabled.
If the external keyboard works correctly, the internal keyboard may be faulty. Go to Procedure 3.
If the external keyboard appears to have the same problem as the internal keyboard, the system board may be faulty. Go to Procedure 2.
Procedure 2 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 3. If no error is detected, the keyboard itself is normal.
Procedure 3 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
System board
CPU
If the cable is loose or off, reconnect it firmly and return to Procedure 2. 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.
TECRA S1 Maintenance Manual |
