HAD THIS PROBLEM BUT IT wasn't A DVR IT WAS A D12. ONE OF THE OTHER ROOMS IS MESSING WITH THE DVR. disconnect ONE BOX AT A TIME AND SEE IF THAT FIXES IT IT COULD BE A BAD WIRE GOING TO ONE OF THE OTHER ROOMS. TRUST ME I HAVE HAD TO REPLACE A WHOLE SYSTEM AND RUN NEW WIRE JUST TO FIX THE PROBLEM.
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