Press and hold the on the TV (not the remote) for about 10 seconds while turning it on.
If the system doesn't recognize the file, try a different USB port or re-format the drive using a different tool. Download P75 2831V6 1366X768 Firmware part01 rar
The TV should display an "upgrading" notice. Once finished, it will automatically restart. Troubleshooting Tips Press and hold the on the TV (not