: You must have all parts (part1, part2, etc.) in the same folder to extract the final .bin or .img file using WinRAR or 7-Zip.
: 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 Download MS638 PC822 3840x2160 REF55 part5 rar
Searching for the specific "part5.rar" file for the MS638 PC822 : You must have all parts (part1, part2, etc
: Ensure the firmware matches your 3840x2160 resolution. Installing firmware for a different resolution (like 1080p) can result in a distorted or "mirrored" image. Download MS638 PC822 3840x2160 REF55 part5 rar