I have a 3 year old samsung LCD tv connected to one of the newer direct tv boxes via hdmi. After 2 days the sound stopped working when I would turn on the tv. If I reward the tv about 3-5 times the sounds starts working without issue all day. Sometimes there's no video either. If I change input to another source sound and video work fine and when I switch back to directive input there is still no sound unless I restart the tv several times. Restarting the dvr does not give me sound only restarting the tv does. What could be my problem here?