I did find an answer, reboot. Unplug tv and press the power button on the tv for 30 seconds, (not the remote), it's on the lower left side. When you plug it back in and turn on it may go to the smartcast screen so change the input to the desired HDMI port. When I first rebooted it turned on to the HDMI 1 port then went to smartcast but with a blank screen so I change the input back to HDMI 1. After that it has started fine, all 3 turn ons went right to HDMI 1.Mine did this today for the first time. I would not have thought much of it if I hadn’t seen your post last night. Anyone out there with answers?