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The title says it all. Switching between high def and regular signals usually results in a loss of audio, video, or both. I have to switch between channels repeatedly until it works.
What kind do you have? We have Xfinity from Comcast, and we have connection problems sometimes. A message will pop up on the screen telling me that certain channels aren't available to me at this time and to call a number to have it fixed. Grr, it's so frustrating!
We have a Scientific Atlanta Explorer 8300HD and our provider is Brighthouse Networks. At first I thought the issue was our receiver, but we've since switched that out and the problem continued.