Where do you get a new power supply, and are there detailed instructions on how to swap it out? I had a Series 2 single tuner Tivo and one day it just died: no warning. One day it was working fine, the next day it went into "Welcome, Powering up". It would stay there for a few minutes, then go to blue screen and then start the whole process over again. I called Tivo, we went through the whole Try This routine, but nada, and determined that the HD was dead. Ended ordering a new one. I am so tech challenged it's not even funny. Thanks.