Data line is used to transmit data, is connected to the mobile phone and computer serial port data communication line, can put the data between the computer and mobile phone transmission.

In most cases, when using the HDMI to VGA converter, the signal is unstable, intermittent black screen, etc., which is basically caused by the lack of interface power supply. Each device has different power requirements, so the connection between different devices may or may not require the connection of power lines. For example, there are users in the green HDMI to VGA converter to the home equipment conversion, before the use of Huawei box connected to the TV is completely no problem, the picture is very clear. But later with the notebook connection, the signal is not very stable, the picture is intermittent, after the connection for the power line is basically normal.

HDMI graphics card does not have a built-in sound card, this is more common in the NVIDIA chipset graphics card, with this graphics card, you need to motherboard sound card SPDIF output and graphics card SPDIF input connection (generally the graphics card will provide this wire, there will be a wiring diagram), otherwise, HDMI graphics card no audio input, There is no audio signal in the HDMI signal.

The red is the positive pole, the black is the negative pole, the white and the green are the data transmissions.

Check the ports for wear and tear, and connect the phone to a computer or power pack.