Our Roamio started restarting every 5 seconds last night. The two green lights on the front turn on for 2-3 seconds. Then they go off and the red/blue light flashes. Then it all repeats. Over and over. I left the unit unplugged overnight and no change. I checked the voltage on the power coming out of the cable into the back of the box and it's a steady 12VDC. Any thoughts on how to resolve this?