He pressed and held the power button on the physical TV, not the remote. He kept holding as he plugged the TV back into the wall. The TCL logo flickered. He held for ten more seconds.
Power on the TV while pressing and holding the physical power button on the back of the TV for about 10 seconds. Tcl Tv Software Update Usb
On the TV, go to > System > System update > I can't connect . He pressed and held the power button on
While holding the button, and continue holding for about 10 seconds until the update screen appears or the LED begins to blink. Tcl Tv Software Update Usb