If the TV doesn't recognize the update, try a different USB port or ensure the drive is formatted correctly to FAT32.
The TV powers on but never reaches the home screen. System Lag: Smart features and apps are slow to respond.
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
Once finished, the TV should restart automatically. You may need to perform a factory reset in the settings to clear any remaining glitches. Troubleshooting Common Issues
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. If the TV doesn't recognize the update, try
Plug the drive into one of the USB ports on the side or back of the TV.
While holding down the Power button on the TV (not the remote), plug the power cord back into the wall. Open your
mainboard . Reinstalling the firmware can breathe new life into your 4K Ultra HD display. Why You Might Need This Update