Connect 12V DC power supply and HDMI VGA plug to the boost driver board.
Reminder:
before
power supply to the boost driver board, take away all conductors, under the boost drive board,
which may cause a short circuit, such as electronic components, metal plates, and other
electronic boards. In this case, the 2 welding foot under the boost driver board power supply
terminal have nothing to be protected, and positive and negative legs are very close, so it is easy
to incur power pin short circuit of power pin, as well as will burn the entire display device.