Toshiba PORTEGE M400 - Manual (Page 91)

2.9 Touch pad Troubleshooting 2 Troubleshooting
2.9 Touch pad Troubleshooting
To determine whether the Touch pad is faulty or not, perform the following procedures:
Procedure 1: Diagnostic Test Program Execution Check
Procedure 2: Connector and Cable Check
Procedure 3: Replacement Check
Procedure 1 Diagnostic Test Program Execution Check
Execute the test for Touch pad in ONLY ONE test in the Diagnostic Program. Refer to
Chapter 3, Tests and Diagnostics, for more information on how to perform the test program.
If an error occurs, go to Procedure 2. If an error does not occur, the Touch pad keyboard is
functioning properly.
Procedure 2 Connector and Cable Check
The Touch pad is connected to the connector CN3240 on the System board with a cable. This
cable may have come off the connector of the touch pad or of the System board. Disassemble
the computer and check the cable connections. See Chapter 4 for the disassembly procedure.
If the cable has come off, connect firmly and make sure the operation. If there is still an error,
go to Procedure 3.
Procedure 3 Replacement Check
Check 1 The Touch pad may be damaged. Replace it with a new one and repeat Procedure 1.
If there is still an error, go to Check 2.
Check 2 The System board may be damaged. Replace the System board with a new one
according to the procedure in Chapter 4.
PORTEGE M400 Maintenance Manual (960-541) [CONFIDENTIAL] 2-43