As TiVos get older, power supplies begin to have problems. We have replacement TiVo power supplies for many units, and if you don't see your model listed there, email us. We may have one or two hanging around.

How do you know if your power supply is failing? The easiest test is generally just looking for video out. If you get no video out at all - not even the gray "Welcome, Powering Up" screen, then you probably have a failed power supply. Sometimes, drives will still spin up, and fans will spin up, but you get no video out.

Certain model TiVos exhibit specific problems that can mean power supply failure, other than the loss of video:

Philips HDR series and Sony SVR 2000: These units have a problem where they stop outputting audio. Then, when you reboot, the audio works again for a time, and then it turns off again. This is characteristic of a failed power supply, and we've always seen a replacement fix it.

TiVo TCD140060 and AT&T TCD130040 Series2: These two models have a pretty big propensity for power supply failure, and we're constantly having a hard time keeping these in stock.

DirecTV HR10-250: We've seen a bunch of strange problems with these units get fixed with a new power supply, including HDMI issues (although usually those are the HDMI card), overheating problems (again, actually, usually HDMI problems, but sometimes a bad power supply) and the regular no-video issues.