The newly installed LED screen suddenly turned black, and I was so anxious that I was sweating profusely looking for the control card? Last week, another guy who opened a shopping mall complained to me. He took the repair team to remove the display screen from the bottom and finally found that the control card was under his nose... This is really not an isolated case! Today I will take everyone to play "Everyone is here to find fault",Where does the LED display control card hide?​？

(High-frequency search terms: Novice may not be able to use it for quick increase in fans, but finding a control card is much more than increasing fans)

Don't rush to copy the screwdriver! We need to figure out three soul tortures:​How much impact will the installation method of different scenarios have on the position of the control card? Why do manufacturers play "hide and seek" design? How to save yourself when you can’t find the control card?​To be honest, after working in this industry for a long time, I realized that finding a control card is more exciting than escape room.

General Location Search Manual

According to industry data,​85% of LED screen control cards are distributed in three mysterious locations​​：

1. ​​Deep in the box splicing seam​​: Touch along the display frame, under the metal cover with heat dissipation hole
2. ​​Quick maintenance inside the hatch door​​: Usually the flip design marked with lightning symbols must be opened with a hexagonal key
3. ​Independent control box​: Common configuration of outdoor screens, the waterproof box is hung on the side of the column or bracket

I handled a classic case last month - the control card of the floor tiles screen of a music festival is actually hidden in the LED light bead array! Later I found out that it was a special anti-step model and it had to be taken out with a magnetic suction tool. So,​Installation of special scenarios can really break through imagination​​！

The designer's "little trick"

There is great wisdom hidden here! Let me tell you my best—​​Hidden design reduces failure rate by 50%​. Especially the stadium fence screen, the exposed control card is poured through the fans' beer every minute.

I handled a project last year even more amazing: the control card of the shopping mall’s transparent window screen is installed on a two-meter-high beam, and it must be used to inspect and repair it. Although it is troublesome, it does avoid customers' mistouching. Now the new device is even more exaggerated, it's alreadyBiometric hatch​, those without permission cannot be opened!

Guide to self-rescue in emergencies

What if you can't find it according to the regular position? These three tricks can help:

• ​​Remote Control Menu Tracking​​: Enter the "Hardware Information" page set by the system, the control card position will be automatically displayed
• ​Thermal imager scan​: When the equipment is running, the temperature of the control card area is 3-5℃ higher than that of the surrounding area
• ​​Speaking sound and position identification method​: When running the diagnostic program, the beeps near the control card have the most rhythmic feeling

There is a real case that must be said: the logistics company's brother used the power box as a control card, and the driver chip was burned due to a short circuit.​​A important thing is said three times: power off operation! Power off operation! Power off operation!​​

Special scene positioning guide

I only realized after doing this job,​The position of the creative display can make your chin fall off​：

1. Transparent video wall: metal mesh mesh sandwich hidden in light-transmitting area
2. Arc advertising screen: There may be secrets at every curve turning point
3. Rental folding screen: integrated inside the quick disassembly handle

What convinced me the most was the wavy bucket screen of an e-sports hall. ItsDistributed control card array​Design, allowing maintenance from any location, I will give you full marks on this idea!

Black technology for protective design

Now high-end equipment is armed to the teeth:

• ​Self-drying sealed cabin​: With absorbent chip and drain valve
• ​​Shock-resistant buffer layer​: Military-grade shock absorbing material package
• ​Emergency pop-up device​: Automatic ejection control card with temperature exceeding 85℃

However, these technologies have also failed. Last year, the smart hatch on a theater screen was always pressed by naughty kids as a toy, and later they could only install a physical lock...

The secrets of the repairman

Twenty years of master's personal teachingFour-step positioning method​, it is recommended to smoke and suck the lungs:

1. Look (find unusual bulges or special marks)
2. Touch (feel the difference in box temperature)
3. Test (using a multimeter to track 5V power supply point)
4. Shooting (the most convenient way to find live videos for the manufacturer)

Once I met an overseas customer and insisted that our screen did not have a control card installed. After watching the video, he used the signal receiver as a control card for half a month... This misunderstanding is a mess!

Editor's opinion: Don't do it rudely if you can't find a control card. Now many new devices support it.​Remote Diagnosis Function​It's already. I want me to say, focus on the equipment when choosing​Full-cycle technical services​​, such as 24-hour remote guidance and intelligent fault warning, there are many more things than tangled with the position of the control card. Of course, when you encounter a situation that you really can’t handle, it’s most reliable to contact the manufacturer’s technical team directly. I heard that some brand engineers can come with spare parts for two hours, and there is no one else in this service!

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