Hey! Novice friends who have just taken over the management of conference room equipment, are they troubled by looking at the large screen on the wall? Don't worry, today we will talk about how to connect this LED display that makes people love and hate. To be honest, when I first debugged, I couldn't tell which one was inserted with seven or eight wires. I don't want you to experience this crazy experience again.

1. Finding the right interface is like finding a partner, the most important thing is

​​The question is: What are the dense interfaces behind the display for? ​ ​
Don't rush to plug in the wires first! We need to first understand a few key interfaces:

• ​​HDMI interface​​: This guy with trapezoidal notch is the leader in transmitting high-definition images, with a stable 4K/60Hz image quality.
• ​​DP interface​​: Multiple smaller bevels than HDMI, suitable for scenes that require high refresh rate (such as 1920Hz game screen)
• ​​Type-C interface​​: Now many new laptops use this, one wire to complete audio and video transmission
• ​​Network cable interface​​: A dedicated channel for control card, responsible for receiving and sending instructions"

To give a real example: When helping customers debug last week, they forced the network cable into the RJ45 audio port, but the screen did not light up. So,​ ​First, recognize that the interface type is ten times more important than blind plugging​​！

2. The connection order is particular, and the same as cooking

​​Core question: Turn on the computer first or the display first? ​ ​
Here is a bloody and tears lesson to tell! Once I tried to save trouble and plugged in and unplugged it, but the control card was burned. The correct way to open it should be:

1. ​​In power outage​​Connect all the cables (say important things three times! )
2. Start the display power first and wait for the LOGO screen to appear
3. Start the computer host again, so that the system automatically recognizes the device
4. Finally, open the control software to detect the signal status

I remember that the last time I installed a screen for a certain company, the technical guy insisted on operating the opposite, and the snowflake screen appeared. Later, I reworked it according to the standard process and solved the problem immediately. Look,​ ​The order of starting the device is the same as adding seasonings to stir-frying dishes. If the steps are wrong, the taste will be strange.​​。

3. Don’t be blind during the debugging stage, keep a close eye on these parameters

​​The question is: What should I do if the screen is incomplete/with a smear? ​ ​
At this time, you may have to take out your phone to take a photo (don’t laugh, there are really customers doing this). In fact, just adjust three parameters:

• ​​Resolution​​: It is recommended to choose​​3840×2160@60Hz​​This golden combination is like a puzzle that must be tightly slit.
• ​​Refresh rate​​: Commonly used in conference rooms​​1920Hz​​, the value is too low and there will be water ripples
• ​​Color mode​​: Choose RGB full color gamut mode to ensure that the logo color in PPT does not go wrong

Once a customer complained that the character's face turned blue and found that he had chosen the YUV mode. After switching to RGB mode, the skin tone on the large screen immediately became rosy. So,​ ​The parameter setting is like a beauty camera, only if you adjust it correctly can you have a good look​​。

4. First aid kit for difficult and complicated diseases can save lives at critical moments

Don't smash the equipment when encountering these situations:

• ​​Black screen but power light​​: Ninety percent of the signal source is selected wrong, press the "Source" key on the remote control to switch
• ​​Screen stuttering​​: Check whether the cable supports 4K transmission (identify HDMI2.1 or DP1.4 marks)
• ​​Partial screen​​: Eighty percent of the module cable is loose, and you can reset by gently pressing both sides of the interface.

I encountered a case last month, and the display suddenly appeared in colored stripes. After a long investigation, I found that the decoration master had penetrated the net cable when he was nailing the poster, and he immediately recovered after changing the cable. So,​ ​80% of the problems are caused by the line​​。

If I want to say my personal opinion, the current LED connection technology is becoming more and more humane. For example, some new screens already support wireless projection, and the phone can be connected by touching it. However, the old saying goes, "Learn to crawl before you can leave." If you understand these basic operations, it will be easier to get started when you encounter smarter devices in the future. Do you think this is the reason?

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