Roku TV done this, factory reset, the called for help unplug then plug back in press activation button for 15 seconds. Home screen comes on good for about 15 minutes then all goes gray. Done everything before I did this, unplugged all devices no internet connection everything I could un plug I did then did a factory reset. I was wondering if on this model there is a physical button or pin hole some place to do a reset? What is going on? I would like to do the factory reset without up dating all the channels can that be done?