Cable Connection problem

I have the regular cable box from Cox in living room. In the bedroom I just have the cable from the wall to the tv. The other day, on the bedroom tv, all channels just went fuzzy and has not worked since. The living room works fine.  I have disconnected and re-connected the cable. I have just basic cable and interent with Cox. I am wondering do you maybe have to pay to use a second tv on their cable, even though it is simply from the wall connector rather than a box? It has worked fine for over a year and I have not heard anything about paying for a 2nd tv, so I dont think that is it. Anyone have any ideas?