How to insert the 16 holes in the desktop computer group chassis?

What 16 holes, preferably on **.

The six different-colored jacks on the back of the case in the picture above are audio jacks, which can be used to connect audio source input and output devices such as external speakers, microphones, headphones, and Walkmans.

Users can plug in the jack of the same color as the above figure according to the plug color of the relevant equipment.

Different computers have different panel sockets.

<> you can refer to this diagram.

In addition, if there is a discrete graphics card installed, the display needs to be plugged into the discrete graphics card below, and the output interface of the graphics card is now generally DVI, HDMI, SP, etc.

VGA interface.

The information processed by the graphics card is eventually output to the display, and the output interface of the graphics card is the bridge between the computer and the monitor, which is responsible for outputting the corresponding image signal to the display. Due to the design and manufacturing reasons, CRT displays can only accept analog signal input, which requires the graphics card to be able to input analog signals. The VGA interface is the interface that outputs analog signals on the graphics card, and the VGA (Video Graphics Array) interface is also called the D-Sub interface.

Although the LCD can directly receive digital signals, many low-end products use the VGA interface in order to match the VGA interface graphics card. The VGA connector is a D-type connector with a total of 15 empty pins on it, divided into three rows of five each. The VGA interface is the most widely used interface type on graphics cards, and most graphics cards have this interface.

At present, most computers are connected with external display devices through analog VGA interfaces, and the display image information generated digitally inside the computer is transformed into R, G, B three primary color signals and line, field synchronization signals by the digital analog converter in the graphics card, and the signal is transmitted to the display equipment by cable. In the case of analog display devices, such as analog CRT displays, the signal is sent directly to the corresponding processing circuit, which drives the control CRT to generate the image. For digital display devices such as LCD and DLP, the display equipment needs to be equipped with a corresponding AD (analog-digital) converter to convert the analog signal into a digital signal.

After the D a and A D 2 conversions, it inevitably caused some loss of image details. The VGA interface is understandable for CRT displays, but when it is used to connect a display device such as a liquid crystal, the image loss during the conversion process will cause the display effect to decrease slightly.

Is there a three-hole where the headphones are plugged in?

One is headphones and the other is a microphone.

The other I don't know hasn't been used.

There are three headphone jacks behind the computer host, not all of them are headphone jacks, and there are audio interfaces. Green is the audio output, which is connected to the speaker or headphones, red is connected to the microphone, and blue is the audio input.

The details are as follows: 1. Audio input interface (light blue).

You can connect the audio output of the recorder, speaker, and ***** to this audio input. When setting up the four-channel and six-channel speaker mode, this interface is used as a rear speaker.

2. Audio output interface (grass green).

You can connect a single audio receiver such as headphones or speakers. When setting up the 4-channel and 6-channel speakers, this interface is used as a front speaker.

3. Microphone connector (pink).

This interface is connected to the microphone. When setting up the four-channel and six-channel speaker mode, this interface is used as a subwoofer connection.