This just started today. I'm watching a channel and the vip722 loses signal lock. If I change the channel and then back to the same channel the channel is fine again. Channel is fine for about 5-10 minutes, then loses lock again. I change the channel and its instantly back. I've checked the cables for tightness outside on the dish, the ground block, and the back of the vip722, no loose cables found. It does not seem to matter what channel I am watching. So far it has done it on USA. CNN. SCIFI, A&E, BIO, both HD and SD channels. Not sure where to look next. Its getting very annoying switching channels just to keep watching tv.