Hi All

I have a sharp lcd model lc45gd5u
anyhow, i am seeing a large purple bar that keeps going up on screen (it goes on constantly). happens when i watch tv. There is no problem when i watch dvd. However, when i have it on dvd mode (with the blue screen), i notice it, but not when the dvd is actually playing. Oh. and i use monoprice cables.

If anyone might know what is going on, let me know
Thanks