Toshiba S2 Manual Do Utilizador

2.5  Keyboard Troubleshooting 

To determine if the computer’s keyboard is functioning properly, perform the following 
procedures. Figure 2-5 outlines the process. Start with Procedure 1 and continue with the other 
procedures as instructed. 

Procedure 1:  External keyboard check 

Procedure 2:  Diagnostic check 

Procedure 3:  Connector and replacement check 

Connect a USB keyboard to one of the computer’s USB ports, then boot the computer. The 
computer automatically detects the external keyboard. 

If the external keyboard works correctly, the internal keyboard or its connections may be faulty.  
Go to Procedure 2. 

If the external keyboard appears to have the same problem as the internal keyboard, the system 
board may be damaged.  Replace it with a new one following the instructions in Chapter 4. 

Run the Diagnostic Program, which will automatically execute the Keyboard Test.  Refer to 
Chapter 3, Tests and Diagnostics for more information on how to run the program. 

If an error is located, go to Procedure 3.  If an error does not occur, the keyboard is functioning 
properly. 

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 2. 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.