I have been using this television set for viewing television,dvd's, and also my computer. Suddenly now my computer will not play thru this television. Not on any of the three hdmi connections. all it tells me is "resolution mismatch, change devices resolution". But the resolution cannot be changed. Television and dvd's still play fine My computer will instantly play thru any other monitor or television set. Will you please advise me as to what the problem could be.