Hi,
We have a problem about our 4100 DMD. When I turn it on there is a horizontal line across the whole DMD. It stays there no matter what image I load. But when I turn it off, it is gone. 

The attached pictures are some information about this DMD and the line on DMD. This line only exists when we turn it on. I check the cable and connector, all look good.
This is some information about this DMD. Is it in guarantee? Thank you!