V52 Error on 1 of 2 Tuners

I have a two tuner Premiere that just started having a problem with one of the tuners. It had been working fine since the cablecard was first installed. My Premiere has software version 20.4.1.



Suddenly, I can only use tuner 1, which gets all of my channels. Tuner 0 shows a V52 error on all cable channels, both standard and HD.



I'm not sure if it's relevant, but at about the time this issue started, the Tivo rebooted itself a couple of times while wathching live tv.



I have tried several times to both restart the box and to reseat the cablecard and still have the issue.



I decided to hook up an antenna to test and was able to receive over the air channels on both tuners. Then the next day, I got V53 errors on all but one over the air channels on tuner 0, while all over the air channels work with tuner 1.



I haven't had a chance to call Comcast yet, but if I am having similar issues with the same tuner using an antenna, could it even be related to the cablecard?



I have a Roamio as well and have no issues on that box.



Anyone experience something similar or any suggestions if there is anything else I should try before trying to call Comcast? I haven't had best of experiences dealing with Comcast in the past.



Thanks!