Was getting ABC in vegas on 12-5 and 12-6 ever since it came online last month. Two days ago, they disappeared. I know from TitanTV that they also appear on 13-1 and 13-2. I have an RCA DTC-100. Did channel search three times. Nothing. Was getting above 80 on signal strength before the channel disappeared. Does anyone know if they stopped transmitting the signal? I don't think my antenna is the problem. I'm baffled.