Yes, it could be a cable or connector issue. Try swapping the DVRs. If the problem follows the "bad" DVR, then you know something is wrong with the DVR. If the problem stays in that room, then something is wrong with the cable feeding that room.
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Yes, it could be a cable or connector issue. Try swapping the DVRs. If the problem follows the "bad" DVR, then you know something is wrong with the DVR. If the problem stays in that room, then something is wrong with the cable feeding that room.