LG T.v unused for just over a month, went to use this morning & noticed there was cat pee on it (above sensor). Realized that remote wouldn't work even with battery change & panel & sensor not working as usual. Online tip said try putting headphones in jack and then turn TV on could work(unplug/plug in up to 50 times). It is occasionally working. Left it alone and it turned its own volume up to 100!. Unplugged for a few hours - all seemed to work for a few minutes then it started going into input then changing to HDMI and back again, even turning itself off. The t.v is approx $300, I've had it for under 12months. Is this worth repairing? What needs repairing? How much would I be looking at paying?