I have a LG 47LB5900 TV and a Onkyo tx-sr353 reciever. Just cut the cord with Directv and now use a OTA for locals. Problems is how do I get TV sound through the reciever. TV does not support HDMI ARC. Have tried digital optical cable to no avail. Tried RCA cables,also still can only get local channels audio through tv speakers. Everthing else, Fire stick and Sony Blueray play through reciever of course using HDMI cables. Have also tried connecting HDMI from tv to CAB/SAT on reciever to get audio through that output, still nothing. Any help would be appreciated