: If you successfully install the firmware, the factory service code for this board is typically Menu + 1147 . TP.MS338.PC822 USB Firmware Software Bios Bin
: A known firmware link for this board (though version compatibility should be verified) is hosted on Google Drive. Important Precautions Download MS638 PC822 3840x2160 REF55 part5 rar
Searching for the specific "part5.rar" file for the MS638 PC822 : If you successfully install the firmware, the