It looks like my pansat is starting to flake. After a period of continous use the the pricture will start washing out with pixilated effect and menu has a halo at the top. Anybody had the this happen before.
It sounds like your unit may be overheating. I would try putting it in an area that has sufficient air circulation to cool the unit. I have noticed my 2700's get pretty hot, I make sure to put them in a space with lots of air flow to cool them.