Lately, for some reason, my receiver -- R10 -- turns off by itself for several seconds. (Then, of course, its 5 - 10 min. before it "searches for satellites," or whatever, then gets back on.) It always happens roughly the same time -- 6:45 - 7:15 PM. Anyone know why, or if anything can be done? (If it matters, it always happens when I have the music channels on.)