​​"Hey guys, my LED screen always splashed. Could it be that the sending card was lost? "​ ​ I heard this when I was helping my friend deal with a fault last week. Today I will tell you which corner of this mysterious sending card is hidden in the LED screen. After reading the package, you will become a "card-looking master"!

1. What is a sending card?

Let’s talk about the plain words first:​​The sending card is the "cerebral cortex of the LED screen"​​, specialized in translating the pictures in the computer into words that can be understood on the display screen. Just like the chip in our mobile phone, without it, it's just a blind eye.

To give a real case: Last year, a technical guy installed the sending card in the wrong position, and the screen was stuck into PPT. Later it was re-fixed to the control cabinet and immediately became silky like Dove chocolate. So,​ ​Finding the right position is more important than knowing how to install it​​！

2. Three major hiding places are raised

Position 1: "Commander in the Control Cabinet"

​​Applicable scenarios​​: Outdoor advertising large screen, stadium fence screen
​​Why hide here​​：

• ​​Dust-proof and waterproof​​: IP55 protective cabinet is tighter than your refrigerator
• ​​Convenient maintenance​​: You can plug and unplug the network cable by opening the cabinet door without crawling the scaffolding
• ​​Heat dissipation is powerful​​: The built-in cooling fan can cool the sending card by 10℃+

​​Operation Guide​​：

1. Find a metal cabinet with lock (usually affixed with the "control system" logo)
2. Observe the black box with HDMI/DVI interface (approximately A4 paper size)
3. Notice! Don't get confused with the receiving card - the sending card interface is more complicated

Position 2: "Invisible Man Behind the Display""

​​Applicable scenarios​​: Rental screen, floor tiles screen
​​Design mystery​​：

• ​​Quick disassembly structure​​: Magnesium-aluminum alloy buckle, disassembled in 3 seconds
• ​​Invisible heat dissipation​​: Use screen heat dissipation holes to form air convection
• ​​Shockproof design​​: Has experienced truck transport bump test

​​Practical experience​​: Once, the floor tiles failed at the exhibition. The box on the edge was stripped open, and the sending card was attached to the groove of the back plate, and it also had a silicone shock-proof pad. This design saves space and is trampled, which is amazing!

Location 3: "Technical Home with a Separate Chassis"

​​Applicable scenarios​​: XR virtual shooting, smart city command center
​​Advanced configuration​​：

• ​​Dual SIM Hot Standby​​: Main card fails automatically switch to backup card
• ​​Gigabit network port​​: Supports lossless transmission of 4K@60Hz
• ​​Intelligent temperature control​​: Automatically start the heating module below -20℃

​​Industry Trends​​: Nowadays, high-end projects are popular to hide the sending card in a cabinet with fingerprint lock, which is both anti-theft and can remotely monitor temperature and humidity. I heard that the latest model can also be used to check the working status using the mobile APP, which is a perfect black technology!

3. The 3 essential keys to find a card"

Key 1: Look at the direction of the cable

• ​​Video line end point​​: Follow the HDMI cable, you can find it in almost every ten years
• ​​Network cable assembly point​​: At least 3 or more network cables are connected to the sending card
• ​​Power cord specifications​​: Usually equipped with independent 12V/5A power supply

Key 2: Listen to the sound and identify the position

• ​​Work beep​​: Some sending cards will be "dripped" when they are started
• ​​The cooling fan sounds​​: Continuous slight buzzing
• ​​Fault Alarm Tone​​: Intermittent short whistle (report to repair it now! )

Key 3: Touch the temperature positioning

• ​​Warm area​​: Normal working temperature 40-50℃ (slightly hot to the touch)
• ​​Extremely hot​​: Possible heat dissipation may be poor after exceeding 60℃
• ​​Cold and silent​​: Either there is no power or it will be completely strike

Personal opinion time

After eight years of working in the display project, I discovered an interesting phenomenon:​​70% of the sending card failures are actually not placed correctly​​! Last year, I participated in a smart park project. The 20-yuan sending card was installed on a metal bracket and caused signal interference. After re-fixing it with insulating gaskets, the failure rate dropped by 90%.

There is a new way to play in the industry now——​​Intelligent positioning tags​​. Post a QR code to each sending card, and you can display the installation coordinates and maintenance records by scanning the mobile phone. If this technology becomes popular, it will be as convenient as looking for express delivery. We look forward to using this magic tool as soon as possible!

​​The last nagging sentence​​: Newbie should never use magnets to find the sending card! The precision chip inside is most afraid of magnetic field interference. Next time, I will encounter screen snoring again. I will first follow these three methods to locate the sending card, which is a hundred times better than tossing around. Remember, find the right position and achieve twice the result with half the effort!

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