Originally Posted by landrvr1
Yeah, cool. I'll remove the cover later this evening and check it out.
I'm not going to open up a TiVo to check right now, but after removing the power cord plug from the wall socket and then removing the other end from the socket on the power supply, and only then putting the #10 Torx driver to use, look at the power supply near the AC input and see if there's a fuse and if it's blown.
It might be wrapped up in heat shrink or something and you'll need an ohmmeter to check for continuity from one lead to the other, but there should be an F1 silkscreened onto the circuit board if in fact it is a fuse and not some other component like an inductor or varistor.
I mention this because on most S2 and S3 TiVos with "capacitor plague", it degrades the performance of the power supply enough to cause noticeable problems before it kills it completely.