برای سری PREMIUM HD 12900 4k و PREMIUM HD 12800 PLUS 4K
1. Connect pc and box with rs232.
2. Open Ali_bootloader_update_new.exe pc tool, select the right com port,and select right file to update(should use upgrade file)
3. Press "Start" on Ali_bootloader_update_new.exe pc tool.
4. Power on the box, it will auto download sw and try to burn to flash
5. After it finish the upgrade, power off and power on box.