Wait until the flashing stops or slows down (usually about 1 minute). Power off the board and remove the USB drive.
Extract the .bin firmware file (often named SKR8503_100.bin or similar) from the archive. Download RD8503 General 1920x1080 USB rar
Insert the USB drive into the TV's USB port while the power is off. Wait until the flashing stops or slows down
Groups such as lcd tv led tv smart tv software host various versions, including TP.RD8503.PB816_Samsung_1920x1080.rar . Download RD8503 General 1920x1080 USB rar
Similar software can be found on sites like Softwarezone.ga or dedicated Facebook groups like China LED-LCD Tv Bios Bin . USB Installation Procedure