Reliable firmware for these boards is typically hosted on community forums or technical support sites rather than official manufacturer pages:
universal Android TV motherboard . This board is a popular "smart" driver board used to convert standard LCD/LED panels into Android TVs. Key Details for this Firmware : MSD338STV5.0 (often cross-referenced with VS.S358A3.2). Download MSD338STV5 1920x1080 USB part2 rar
The indicator LED should flash rapidly (usually red and green). Reliable firmware for these boards is typically hosted