My TivoHD will show the Powering Up screen when turned on, then after that the TV will lose any signal from the Tivo. The green light is on at the front, as well as the format light. I have not set this up at all yet. I got it as a gift a few months ago, but only just got the internet to be able to use it. From what I've read on the forum, I'm guessing it's a Hard Drive failure? Can anyone confirm this for me?