Why doesn’t the LED screen you just bought light up? Maybe the sending card was installed in the wrong place! When newbies install LED screens, they will always be confused by this iron box. Just like how novices quickly increase their fans, it is necessary to find the right platform, the location of the sending card directly determines whether your screen can "live". Today we will talk about this key issue in plain language.

Let’s talk about what this iron lump is. The sending card is equivalent to the brain of an LED screen, and is specifically responsible for "translating" the video signals in the computer into languages that can be understood on the screen. Without it, your screen would be a mute who couldn't speak. But don't rush to unpack the packaging, you have to figure out the correct place to go first.

​​Three elements of installation location​​：

1. ​​Close to the main control device​​: It is best to install it in the cabinet where the computer is located, and the signal cable should not exceed 30 meters.
2. ​​Ventilation and drying​​: Never stuff in stuffy iron boxes or damp basements
3. ​​Firmly fixed​​: Use matching screws to fix them, don't throw them directly into the equipment pile

There are actually three common installation locations:

• Control room cabinet (accounts for 80% of installation scenarios)
• The maintenance compartment on the back of the screen (suitable for fixed installation large screen)
• Mobile box mezzanine (Lease screen is commonly used, pay attention to shockproof)

There is a key point here that is easy to make mistakes - the positional relationship between the sending card and the receiving card. Just like when cooking, you have to add oil before serving, the sending card must be installed at the signal source. If you switch the positions of the sending card and receiving card, the picture will be as unsightly as the fried dish.

​​Five-step installation method​​：

1. Power off first! The card burn rate is as high as 60% when operating with live operation
2. Check the direction of the interface according to the instructions (insert the gold finger downward)
3. Only when you hear the "click" sound is inserted
4. Don't tighten the fixing screws (leave half a circle of moving space)
5. After turning on the computer, look at the indicator light: Green light always on = normal, red light flashes = fault

A newbie asked, "Why didn't I respond when I clearly inserted it?" "Mostly these three pitfalls:
① Graphics driver has not been updated (especially 4K screen)
② The power supply is insufficient (the transmission card is more stable to supply power separately)
③ The cooling fan is installed inverted (the air inlet must be aimed at the caliper)

Speaking of this, someone may ask: "Will it explode if the sending card is installed in reverse? "This is not the case, but it is easy to burn out the interface. There was a case before, when a novice pushed the gold finger of the sending card upwards, but the motherboard slots were all hung up, and the repair fee was enough to buy three new cards.

The main way to determine the installation is: take a picture of the screen with your mobile phone. If there are water ripple on the phone screen, it means that the refresh rate is set correctly ； If a black horizontal bar appears, check the sending card connection line immediately. This technique is much more effective than reading the instruction manual, and it is effective for personal testing!

The editor thinks that sending a card is like a relationship, and everything goes smoothly if the location is right. Don't think it's enough to just find a place to stuff it in. This thing is very picking. Next time you encounter a screen strike, please touch the sending card first to be hot or not, and it will most likely be able to lock it quickly.

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