You must extract the .rar file on a PC and move the internal .bin file to the root directory of a FAT32 formatted USB drive (ideally 4GB or 8GB).
but having a different internal board number) can lead to a "black screen" or inverted colors. Download ONIDA LCO22VMO Firmware USB rar
Expert walkthroughs on YouTube suggest a consistent methodology for using these USB-based firmware files: You must extract the