Even if it started working again, why would you want to keep it? My first Roamio Pro got stuck on the powering up screen. I unplugged it several times with the same result. When I took it back to BestBuy, and they plugged it in, it booted up without issue. They asked me if I wanted to keep it. There was no way I was keeping that box after what happened. I was surprised they even asked me that.
TiVo Mini x3
Roamio Basic OTA
39TB unRAID1--53TB unRAID2--36TB unRAID3