2 Troubleshooting Procedures
Satellite L500D /Pro L500D Maintenance Manual
18
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
Procedure 1
External keyboard check
Connect a USB keyboard to one of the computer’s USB ports, and 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 having some problem. Replace it with a new one and following the
instructions in Chapter 4.
Procedure 2
Diagnostic check
Run the
test and Diagnostics
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 ok.
Procedure 3
Connector and replacement check
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.
Summary of Contents for Satellite L500D Series
Page 1: ... Toshiba Personal Computer Satellite L500D Maintenance Manual TOSHIBA CORPORATION ...
Page 13: ...Chapter 1 Hardware Overview ...
Page 16: ......
Page 35: ...Chapter 2 Troubleshooting Procedures 2 ...
Page 36: ......
Page 103: ...3 Tests and Diagnostics Satellite L500D Pro L500D Series Maintenance Manual 13 ...
Page 123: ...Chapter 4 Replacement Procedures ...
Page 233: ...Satellite L500 Pro L500 L500D Pro L500 Series Maintenance Manual E 6 11 Czech CZ Keyboard ...
Page 236: ...Satellite L500 Pro L500 L500D Pro L500 Series Maintenance Manual E 9 17 German GR Keyboard ...
Page 243: ...Satellite L500 Pro L500 L500D Pro L500 Series Maintenance Manual E 16 30 Japanese JP Keyboard ...