I've just returned to the TiVo world after getting rid of my Series2 waaay back. I've started using my Roamio yesterday with an OTA antenna (a Winegard FlatWave Amped) and it was working great...until the black screens came. Rebooting or power cycling would resolve it the first few times. Now, it's stuck in a reboot loop on the "Welcome! Starting up." screen. Guess it's time to call TiVo after a whole half-day of use. Really disappointing.