motherboard, a universal "smart" driver board used in various 4K UHD LED televisions.
Insert the USB into the TV's USB port and connect the power. The update should start automatically, indicated by a blinking LED. Download SK708D PC821 3840X2160 REF52 part02 rar
Extract the files to find the main firmware image, often named allupgrade_aml972_8G_1G_sos.img . motherboard, a universal "smart" driver board used in