Whenever I have certain visualizations on (like hula hoops and funnelweb) I notice there are two invisible lines on the screen...One going across the center vetically and horizontally. It is almost like there is burn in there. when the graphic goes across the lines then become visible.....has anyone else had this problem?

This hasn't been brought up for a long time. Search the Empeg FAQ (linked at top of menu above). I think it's normal but the FAQ explains what it is.

I don't see it anywhere....

You mean this?

it is kind of like that, but it is only in the center of the display.....one line up and one line across.....anyone else have this problem? check with the the hoola hoops visual