I notice multiple times a day my vip612's fan will be running full speed. I turn on the TV to see what is happening and all I get is "Acquiring Satellite Signal" for a couple minutes as it steps through the 110, 119 and 129 sats and then the picture returns (I'm using a Dish 500 dish for 110/119 and a 24" dish for 129). Yesterday when it was doing this there wasn't a cloud in the sky. Does this indicate that the 612 is re-booting on it's own? I have a 722 in the house as well and have no problems at all. I'm not sure if I should call and demand a different receiver (only had these installed a few weeks ago) or if you folks think it could be something else. But I would think if it was a cable or LNB or something it wouldn't cause the receiver's fan to go full speed. Thoughts?