The "Part 3" rar typically contains a collection (Mix Software) of various panel resolutions for this board. You can find official archives and community uploads here:

Wait until the blinking stops (do turn off power during this time). Complete: Remove the USB and restart the TV. ⚠️ Important Safety Tips

Installing the wrong resolution firmware can result in a distorted image or "Black Screen."

Download and extract the .rar file. Look for the file ending in .bin .