If you're still having trouble finding the exact file, you can check the Official Aconatic Support Page for the latest manual and software releases.
If the TV doesn't recognize the update, try a different USB port or ensure the drive is formatted correctly to FAT32.
Open your .rar package and extract the firmware file (usually ending in .bin or .pkg ) directly to the root directory of your USB drive. Do not put it in a folder. Download MS638 PC822 3840x2160 Aconatic 49DSU800 part1 rar
While direct download links for the firmware for the Aconatic 49DSU800
The correct (often labeled as MS638_PC822_Aconatic_49DSU800_part1.rar ). WinRAR or 7-Zip to extract the .rar package. Step-by-Step Installation Guide If you're still having trouble finding the exact
While holding down the Power button on the TV (not the remote), plug the power cord back into the wall.
Release the button once you see an "Upgrading" or "Software Updating" progress bar on the screen. Do not turn off the power during this time, as it could permanently damage the mainboard. Do not put it in a folder
If the image appears distorted after flashing, you may have used a 1080p firmware version instead of the required 3840x2160 build.