I've just received a replacement Bolt for a two month old unit that would not come out of stand-by when I came back from a six week trip. What reading I've been able to do indicated a likely power supply failure, and several cautions about putting the unit into stand-by. I set up the new unit last night with the "power saving" settings off, but I'm curious as to what others do for that setting. Because of travel, the Tivo will go weeks at a time without being used.