Go to About > System Upgrade > USB Upgrade .
Check the Changhong Europe Service or your local region's official support site.
Select Confirm . The TV will automatically shut down and reboot to begin the flashing process. Do not power off the TV during this time. Where to Find Downloads
Flashing the wrong firmware can "brick" your TV (render it unbootable). Always double-check that the board number (JUC7.820.XXXX) and the screen resolution (1920x1080) match your specific hardware labels.
Plug the USB into the TV. Press the SETTING button on your remote.