We are having difficulty in the audio on channel 7, which is our ABC network.  The sound keeps fading out & coming back.  No other channel has this problem.  Our receiving provider, dish network, says it is not their problem but in the ABC network.   Is there a way that you can correct  this problem, as it is our favorite network for news.  Thank you for your time & hope you can solve this problem.  Sincerely,  Donna Denton