Toshiba PORTÉGÉ R700 Series Maintenance Manual page 105

Troubleshooting Procedures
Procedure 4 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 Finger/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.
Check 2 Finger Sensor board or the cable may be faulty. Replace it with a new one
following the instructions in Chapter 4, Replacement Procedures. If the problem
still occurs, perform Check 3.
Check 3 System board may be faulty. Replace it with a new one following the instructions
in Chapter 4, Replacement Procedures.
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PORTÉGÉ R700 Series Maintenance Manual (960-833) [CONFIDENTIAL]