​​Alas, why can't the LED screen I just bought connect to the computer? ​ ​
The backend has exploded in the past two days, and many friends asked anxiously: Why didn’t the LED screen you bought for a lot of money plugged in to the computer? Don’t panic! This is just like a new phone and WiFi, and it looks complicated and it is actually just a few steps. Let me talk about some cold knowledge first - 85% of the LED screen connection problems on the market are actually not selected correctly!

​​Step 1: Finding the right interface is more important than anything else​​
You bent down and looked behind the computer. Are there these interfaces?

• ​​HDMI port​ ​: It looks like a widened version of USB, which can transmit 4K images (now 9 computers have this one)
• ​​DP port​ ​: Square with a bevel, the favorite of e-sports players (transmission speed is 30% faster than HDMI)
• ​​DVI port​ ​: It’s old and antique, and now the new graphics card basically doesn’t bring this thing (but some engineering screens are still in use)

The key point is here! ​ ​The receiving card of the LED screen must match the computer interface.​ ​. Last week, a guy who opened a milk tea shop was holding the latest MacBook and couldn't connect to the advertising screen in the store. Later, he found that the screen only supports HDMI, while his computer only has the Type-C interface. The solution is also simple, just buy a adapter that costs 30 yuan.

​​Don't step on the driver installation pit​​
At this time, someone must be patting his thigh: Why is the screen still black if the interface is inserted correctly? It's probably because the driver is not installed!

1. Download the dedicated control software on the official screen website (note to select the right system version)
2. Must check it when installing​ ​「Video decoding component」​ ​(Many people missed this step)
3. Restart the computer and then open the software (don't think it's troublesome, this step can solve 40% of the crash problem)

There is a real case: An Internet cafe owner installed 20 LED screens, but 3 were always flashing screens. Later I found that Windows automatically updated the driver overwrites it, and it will be normal immediately after reinstalling the dedicated driver. So remember,​ ​After installing the driver, turn off the system and update automatically​​！

​​The great question in resolution settings​​
When you see this, you may ask: The picture is out but why is it deformed? This is what we have to look at:

• ​​Computer resolution​ ​: It cannot exceed the maximum support of LED screens (for example, the screen only supports 1920x1080, if you do not set it to 4K, there will definitely be a problem)
• ​​Refresh rate​ ​: It is recommended to be transferred to​ ​≥1920Hz​ ​(There will be a scan line when shooting below this number)
• ​​Scaling​ ​: Never choose 125% or 150% (100% most reliable when you are honest and practical)

Last year, a clothing store was doing live broadcasts, and the screen was always stuck. Later I found out that the boss set the resolution to 3840x2160, and their screens actually only support up to 2560x1440. After adjusting the appropriate resolution, the picture is as smooth as Dove chocolate.

​​Editor's opinion time​​
After using so many LED screens, my biggest feeling is that you must not believe in the "plug and play" nonsense! Professional equipment must be followed by professional procedures. Recently, I discovered a new trend: many high-end screens have begun to support them​ ​Wireless screen projection​ ​, like our company's latest rental screen, it can transmit 4K signals within 30 meters. But then again, although wired connections are troublesome, they are really undeniable to choose stability.

Finally, I would like to say: Don’t scold the manufacturer when you encounter a black screen, check if the signal line is loose. Really, at least 50% of the after-sales problems are caused by the untied cable! If you can't connect next time, follow this step to check and ensure that you can save 200 yuan on-site service fee.

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