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2 Troubleshooting Procedures
Procedure 3
Connector Check and Replacement Check
The Digitizer and LCD are connected to the system board as below.
Check 1
The Digitizer may be disconnected. Make sure the Digitizer is connected to the
CN9540 on the system board. If there is still an error, go to Check 2.
Check 2
The Digitizer or the system board may be defective. Replace it with a new one
following the steps in Chapter 4. Then check the tablet pen is working properly.
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[CONFIDENTIAL]
PORTEGE R400 Maintenance Manual (960-623)
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