: Ensure the firmware matches your 3840x2160 resolution. Installing firmware for a different resolution (like 1080p) can result in a distorted or "mirrored" image.
Searching for the specific "part5.rar" file for the MS638 PC822 Download MS638 PC822 3840x2160 REF55 part5 rar
: A known firmware link for this board (though version compatibility should be verified) is hosted on Google Drive. Important Precautions : Ensure the firmware matches your 3840x2160 resolution
: Detailed firmware files, including EMMC read/write files and USB update packages, are often shared on platforms like Advance Electronics or Electro-Support . Download MS638 PC822 3840x2160 REF55 part5 rar