Yea, just went through this and gave up. TV was only 5 years old. I tried the unplugging, the reset, the factory reset, unplugging everything and factory resetting, holding the power button down, bought a new HDMI cord, but none of it worked. So I called Costco tech support and they couldn’t help BUT did figure out if I shined a bright flashlight on the screen I could see what it was supposed to be showing. Went through all the menu options but none of them helped. I then called Roku who did not help and lastly TCL who acted like this was the first they heard about it….really? This is obviously a glitch that THEY created by sending out bad coding for the update. I’ll be contacting BBB and am looking to find out who is starting the class action LS. Total BS.
