Wait for the "Software Upgrading" or "Do not turn off" progress bar to appear.
If your TV is still functional and connected to the internet, you can check for official updates without manual files: Download ONIDA 55UIB Software part04 rar
Ensure your USB flash drive is formatted to FAT32 . Wait for the "Software Upgrading" or "Do not
Once you have successfully downloaded all parts (including part04) and extracted the final firmware file, follow these steps to install it: Download ONIDA 55UIB Software part04 rar
Press and hold the on the TV (not the remote) and then turn on the main power switch.