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2 Troubleshooting Procedures
2.8 Touch pad Troubleshooting
To check if the computer’s touch pad is malfunctioning or not, follow the troubleshooting
procedures below as instructed.
Procedure 1: Diagnostic Test Program Execution Check
Procedure 2: Connector Check and Replacement Check
Procedure 1 Diagnostic Test Program Execution Check
Execute the Touch pad test (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, touch pad is functioning
properly.
Procedure 2 Connector Check and Replacement Check
The connection of the cable and board may be defective. Otherwise, they may be faulty.
Disassemble the computer following the steps described in Chapter 4, Replacement
Procedures, and perform the following checks:
Check 1 Make sure the cables are firmly connected to the Touch pad board and system
board.
If the connection is loose, reconnect firmly and repeat Procedure 1. If the problem
still occurs, go to Check 2.
2-40 [CONFIDENTIAL] PORTEGE M700/M750 Maintenance Manual (960-661)