I now shut off the sat box also when I turn the TV off. Before I was
just shutting the TV off, and leaving the sat box on 24/7. No wonder it
overheated :-) Might you be leaving the box on 24/7 also?

really they are still on 24/7 with the exception of the modulator that
outputs a picture.

good point about overheating boxes MUST be in free air not stacked up
in a entertainment center