I got my 622 last March 11 and it was trouble free till September. It has been resetting at least once a day. The unit turns off, the fan noise gets loud,then comes on and does tests 1-5 and then works OK. I already got one replacement and the same thing happens. The other devices that run off the same power supply do not turn off, so it can't be losing power to reset it. Do you guys think this could be a software issue or other cause? I'm tired of the interruptions and loss of DVR content. HELP!