Toshiba TECRA M4 - page 111

2 Troubleshooting 2.16 Tablet Pen Troubleshooting
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 LCD might be disconnected. Make sure the LCD is connected to the CN5501
on the System board. If there is still an error, go to Check 3.
Check 3 The Digitizer, the LCD 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.
2-54 [CONFIDENTIAL] TECRA M4 Maintenance Manual (960-521)