My Tivo OTA occasionally freezes when I first try to access it after not using it for a day or so. Today it happened when I tried watching TV using a Mini. It was stuck on Guide. I went to the Roamio and it was trying to Wake but was stuck on the that screen. Each time it has done this, the only way I could resolve it was to unplugged the Roamio and and allow it to reboot? Any ideas?