The other day our 722 receiver was making noise, sounded like the hard drive running constantly, and the next morning it was DOA. I tried rebooting and unplugging for a minute, didn't work. Called tech support, they had me do some troubleshooting, no-go. They ship me a replacement. My wife comes home, plugs it in and for 3 days now it's working fine and quieter than it's ever been. Considering what a PITA it is reprogram the DVR, I'm thinking I'll keep it and send the replacement back. Thoughts or advice?