I remeber a few years ago, I was watching TV, clear night and lost signal. Check switch wouldn't pass so I grabbed a ladder and my meter, up to the Dish and 72 was fine, but 61 showed no signal. So I figured my LNB went bad, climbed down, grabbed another one and back up the ladder where my meter was still on and the 61 showed a little bit of signal. Hmmm, so I watched and over the next few minutes it slowly came back up to normal signal strength and never had a problem again, but other's had reported the same signal loss at the same time