I don't believe it. I've had the PX75-G1 for less than a week and it's been fabulous. And then as quickly as it came into my life... It's busted.
I got a new Amazon Fire Stick 4K today, so I started by plugging it directly into the TV in HDMI 4. I got it all set up and tested out some Dolby Vision and HDR sources that wouldn't work on my old gen 3 Fire TV. Then I powered everything off and plugged the Fire stick into my Yamaha AV receiver.
Immediately there were issues with the display and I could only get a black screen. I found a remote code to cycle through the various resolutions on the fire stick, and eventually the picture came back when it was set to 1080p/60Hz. Tried to set it to 2160/auto and the picture would no longer display. And then things went haywire.
The TV displayed the no signal warning for HDMI 1, and I tried cycling through the different inputs on my AVR to see if they would work. My Blu-ray player displayed the menu for a few seconds and then it switched to black again. I tried to switch away from HDMI 1 and the TV would not respond to remote commands. I powered everything down, switched off the power strip for all the equipment, and let it sit for a minute. Then disconnected the HDMI out from the AVR and turned on the TV. It still was set to HDMI 1 even though the cable wasn't connected and I couldn't switch to any other inputs.
The smart cast app on my phone still worked to control the TV, so I used it to perform a soft reset. Still problems. Then decided to go ahead with a factory reset. That may have been a mistake, because with the TV reset I can no longer connect from the smart cast app. And now the TV starts up in the factory fresh mode, but pressing any button on the remote reboots the TV. I tried changing the remote batteries and factory resetting the remote control to no avail. I found an old Vizio remote from another TV and tried that. Still, pressing any button on the remote reboots the TV immediately.
I called Costco concierge services, and they they walked me through the usual troubleshooting steps: unplug the power and hold the power button for one minute. Pull the batteries from the remote and press every button twice. Still, the TV starts up in the setup mode but pressing any button immediately powers it off and then on again after a few seconds.
At that point the concierge service said we had to get in touch with Vizio, unfortunately they are closed for the night so I'll have to call in the morning. Have a feeling this one is going to require a truck roll and a new set. It's a shame, because the picture on this one is pretty fantastic.
UPDATE 11/27: Working again! See follow-up post here.