After trying everything to get my motorola DCT-6412 DVR to work, I ordered a replacement. Unfortunately, the tech brought only DCT-6408s (single tuner). But the good news is that he informed me that instead of waiting for another service call, I could drive over to the local Comcast headquarters with my old box and exchange it. One fifteen minute drive later, I had a replacement DVR. This replacement DVR works just great so far. It records and plays back with great picture and sound. It pauses live TV and rewinds it without freezing. I only wish I had done this sooner. I was prepared to make another trip over there if the 2nd one was even worse than the first.....but that won't be necessary.
Wayne
Wayne