Unzip the downloaded .rar file (part4) on your computer.
Ensure you have the official firmware files downloaded. Download MS638 PC822 3840x2160 Aconatic 49DSU800 part4 rar
Release the button when you see the "Software Upgrading" progress bar on the screen. Unzip the downloaded
Do not power off the TV during the update; this can permanently brick the device. 🛠️ Step-by-Step Installation Download MS638 PC822 3840x2160 Aconatic 49DSU800 part4 rar
If the image appears too large (oversized), ensure the config file matches your 3840x2160 panel resolution.
Once the TV boots to the setup screen, remove the USB drive and proceed with the initial configuration. ⚠️ Troubleshooting
Use a 4GB or 8GB USB 2.0 drive formatted to FAT32 .