Toshiba TECRA S1 Manual Do Utilizador

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.