Firmware for these universal boards is typically hosted on community repair forums and technical channels:
Installing the wrong firmware (e.g., choosing a resolution that doesn't match your physical screen) can lead to a "black screen" or distorted image. Before flashing: Download R85 031 800x600 rar
.rar archive containing the .bin firmware file. Firmware for these universal boards is typically hosted
Ensure your panel is actually 800x600.