: Place the extracted .img file into the root directory of the USB drive.
The file you are looking for is the firmware for the 4K Android TV motherboard, commonly used in smart LED TVs like the Anderson LD5536. This specific hardware typically runs Android 9.0 and supports a 3840x2160 resolution. Firmware Details Download SK708D PC821 3840X2160 MEDIASTR REF90 part01 rar
: Power on the TV. The status LED should begin to blink, indicating the upgrade has started. : Place the extracted
: Plug the USB into the TV's USB port while the TV is powered off. Download SK708D PC821 3840X2160 MEDIASTR REF90 part01 rar
: Once the screen prompts you to remove the disk, unplug the USB and the TV will reboot.
: Offers the Firmware for Anderson LD5536 which uses the TP.SK708D.PC821 board.