Use your remote control to click on the Gear Icon (Settings) , usually located at the top right of the home screen.
Try using a smaller USB drive (16GB or 32GB) as larger external hard drives sometimes draw too much power. The Screen Goes Black and Won't Turn On shinco tv software update extra quality
Continue holding the button until an installation progress bar or an Android system recovery screen appears on the display. Use your remote control to click on the
While holding that power button down, plug the TV's power cord back into the wall outlet. shinco tv software update extra quality
Unplug the power cord for 5 minutes. Try redownloading the update package and flashing it again via the physical button recovery method.