Toshiba PORTEGE M780 Maintenance Manual page 100

Troubleshooting Procedures
Procedure 3
The Digitizer is connected to the system board as below.
Check 1 If any of the connections are loose, reconnect firmly and repeat Procedure 1and 2.
If there is still an error, go to Check 2.
Check 2 The Digitizer may be damaged. Replace it with a new one following the
instructions in Chapter 4, Replacement Procedures and check the operation. If the
problem still exists, perform Check 3.
Check 3 The web camera/digitizer/fingerprint sensor /sw board cable may be damaged.
Replace it with a new one following the instructions in Chapter 4, Replacement
Procedures. If the problem still exists, perform Check 4.
Check 4 The system board may be damaged. Replace it with a new one following the
instructions in Chapter 4, Replacement Procedures.
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Connector Check and Replacement Check
[CONFIDENTIAL] PORTEGE M780 Maintenance Manual (960-809)