Procedure 1 Diagnostic Test Program Execution Check; Procedure 2 Connector Check And Replacement Check; Fingerprint Troubleshooting; Procedure 1 - Toshiba Satellite U400 Maintenance Manual

2.15 Fingerprint Troubleshooting

To check if the computer's Fingerprint is malfunctioning or not, follow the troubleshooting
procedures below as instructed.
Procedure 1: Connector Check and Replacement Check

Procedure 1

Diagnostic Test Program Execution Check

Execute Fingerprint test in the test program. Refer to Chapter 3, Tests and Diagnostics for
more information on how to perform the test program.
If any error is detected, perform Procedure 2.
Procedure 2

Connector Check and Replacement Check

The Fingerprint function is embedded on system board. If Fingerprint malfunctions, its
connection is defective or Fingerprint cable and system board may be faulty.
Check 1 Make sure Fingerprint cable is firmly connected to the connector CN14
Check 2 Fingerprint cable may be faulty. Replace it with a new one. If the problem still
occurs, perform Check4.
Check 3 Fingerprint may be faulty. Replace it with a new one following the steps in
Chapter 4. If the problem still occurs, perform Check 4.
Check 4 System board may be faulty. Replace it with a new one following the instruction in
Chapter 4.
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. If the problem still occurs, perform Check 2.
Satellite U400/Satellite Pro U400/PORTEGE M800 Maintenance Manual
Chapter2Troubleshooting Procedures