ViewSonic VG712s Service Manual page 55

Notice:
1. Make sure VGA cable connected to PC directly, not via anything like "Data transfer" or "Distribution" ... ... After this
action if Ghost image disappears, go to "Yes"; else, go to "No."
2. Check the compatibility on the computer. If it is compatibility problem, feedback the information to ViewSonic; else,
go to "No."
2.3 C. Control Function Troubleshooting
2.4 D. Speakers Troubleshooting
ViewSonic Corporation
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VG712s/b