Follow the official Nordmende/Akai update procedure to flash the mainboard: Unplug the TV's power cord from the wall outlet. Insert USB: Plug the flash drive into the TV's USB port.

Often lists Akai/Nordmende software for download.

Installing the wrong firmware version (mismatched panel or mainboard model) can "brick" your TV or cause screen display issues (flipped or solarized images). lcd tv led tv smart tv software – Telegram