Lately, my Pace DC758D has been shutting down, resetting itself and then restarting. This has been on a random basis, but more often in the last day. We have unplugged the set and then plugged it in the wall directly and not the power bar as we had had it. The box is almost 3 years old. Is it time to buy a new one, or is there a solution to the problem. Also, watching a recorded program last night, the PVR froze, and we had to unplug the cable box to get it going again.