I just wanted to share a quick success story with my Tivo 24004A. It started rebooting itself and eventually just went to a solid blue screen with no lights on the front. Further diagnostic revealed the hard drive drive was not spinning up with IDE cable connected (but it was without, which I found very weird!) Some persistent research about this led me to inspect the capacitors on the power supply, one of which was slightly bulging (it was a 2200uF10v). I went to a local electronics store and purchased a replacement for $1.59, spent about 5 minutes soldering, and my Tivo has been successfully resurrected! Cheers to anyone who finds this information useful.