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post #3 of (permalink) Old 2016-01-05, 12:03 PM
Join Date: Jun 2011
Location: 43° N, 81.2° W
Posts: 8,109
The 50ft HDMI cable raises a red flag. It creates the possibility of a ground loop or spurious electrical interference entering the HDMI circuit that could damage the receiver. The fact that it works fine for 2-3 months and then the issue occurs suggests that some intermittent event or gradual degradation causes the problem to reappear. I would look into using a HDMI balun or some device that will provide a degree of electrical isolation. I would also make sure that the coax cables running from the dish are grounded properly.
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