Toshiba R600 S4202 - Portege - Core 2 Duo 1.4 GHz Maintenance Manual page 114

2 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 Fingerprint 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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2.17 Fingerprint sensor Troubleshooting
PORTEGE R600 Maintenance Manual (960-709)