Cable box question.

I have Xfinity and my tv channels don't work on my tv - I get an error message. Yet Netflix, Hulu, etc. do work with my TV remote. I can also access tv just fine through my computer, so I figure my dvr box needs replacing. But then I see that that dvr box is still recording just fine even though my tv isn't receiving properly. ??? How's that able to happen and what do you think my problem is before I go to the cable store tomorrow. Much thanks.

submitted by /u/woodedlane
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