Do newcomers who have just taken over the LED large screen often hold a USB flash drive around the device, like a confused person who can't find the key? Last month, I encountered a funny and hilarious case - a shopping mall operator forced himself to use the USB interface as a cooling hole and poked it with a toothpick for a long time... Today we broke it apart and broke it and talked about it.​ ​Where does the USB interface of the LED electronic screen hide?​​？

(High-frequency search terms: Novice can't use it to quickly increase fans, but finding a USB interface is much more popular than increasing fans)

Don't rush to disassemble the equipment! We need to understand three basic issues first:​ ​How big are the differences in interface positions of different models? Why do designers hide interfaces? How to deal with the emergency when the interface cannot be found? ​ ​ To be honest, after working in this industry for a long time, I realized that finding an interface is simply a performance art.

General Location Search Guide

According to industry data,​​85% of the LED screen USB interfaces are distributed in the following three places​​：

1. ​​Box splicing seams​​: Touch along the display frame, and the 80% of the raised areas with dust cover are
2. ​​Inside the control card door​​: Need to open the back cover, on the black module next to the signal receiver
3. ​​Quick maintenance port​​: Flip design usually marked "Service Only"

There is a real case that is particularly funny: the floor tiles screen at a certain exhibition, the USB interface is actually hidden in the LED light bead array! Later I found out that it was a specially made waterproof model, and the protective cover must be opened with a magnetic suction tool. So,​ ​The installation of special scenarios is really a brain-breaking idea​​。

Why play "hide and seek" design?

There are great questions here! Let me tell you something——​ ​Hidden interface reduces failure rate by 60%​​. Especially for outdoor advertising screens, the exposed interface is short-circuited by rain and dust every minute.

I handled a project last year even more exaggerated: the fence screen interface of the stadium is designed at the top of the column, and you have to set up a ladder to insert a USB flash drive. Although it was a little troublesome, it did solve the problem of audiences' mistouching. Now the new equipment is even more amazing,​ ​Fingerprint recognition interface cover​​, those without permission cannot be opened!

Emergency Self-Rescue Manual

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

• ​​Remote Control Menu Tracking​​: Enter the "External Device" option in the system settings and will automatically prompt the interface position
• ​​Thermal imager detection​​: When running data transmission, there will be significant temperature changes in the interface position
• ​​Listening to sound and position identification method​​: Listen carefully when plugging and unplugging the USB flash drive, and the beeps near the control card are the most obvious.

Last month, I encountered a weird design when I was helping customers with maintenance - the USB interface actually had to press the snaps on both sides at the same time before it could pop up! This​ ​Compound trigger mechanism​​Although safe, it is indeed not very friendly to newbies.

Special model distribution map

I only realized after doing this job.​​The interface position of the creative display can make you shock your jaw​​：

1. Transparent video wall: hidden in a metal grid in a translucent area
2. Arc advertising screen: Interfaces may be installed at each curve turning point
3. Rental folding screen: The interface is integrated inside the quick disassembly handle

What impressed me the most was the wavy dance screen used in a music festival. Its​ ​Distributed USB array​​Design, allowing signals to be accessed from any point, this idea is not acceptable!

The technology of interface protection is vigorous

Nowadays, high-end equipment is used to protect "armed to teeth":

• ​​Self-cleaning interface​​: With compressed air injection function, automatic dust removal by plugging and unplugging
• ​​Liquid metal seal​​: When not in use, the interface is automatically covered by liquid alloy
• ​​Fiber optic adaptation technology​​: Completely cancel the physical interface and plug the USB drive into the repeater ten meters away

However, these black technologies also fail. Last year, the inductive interface of a theater screen was accidentally triggered by the audience's mobile phone NFC signal, and later it could only be equipped with an electromagnetic shielding layer.

Repair master's private hiding skills

Twenty years of teaching​​Four-step positioning method​​, It is recommended to smoke and suck the lungs:

1. Touch (exploring along the outline of the heat dissipation hole)
2. Look (looking for protective stickers in unusual colors)
3. Test (use a multimeter to detect the 5V power supply point)
4. Shoot (the fastest live video for the manufacturer)

Once I met a Russian customer and insisted that our screen did not have a USB interface. As a result, when the video was connected, he used the HDMI interface as a USB for half a month... This is a big deal!

Editor's opinion: Don't compete with yourself if you can't find an interface. Now many new devices support it.​​Wireless transmission protocol​​Now. I want me to say it, focus on the equipment selection​ ​Intelligent operation and maintenance functions​​, such as remote diagnosis and automatic repair, there are many more interface locations than tangled. Of course, when encountering a situation that cannot be solved, contact the manufacturer directly for 24 hours of technical response is the most reliable - I heard that some brand engineers can provide video guidance until three in the morning, and this service is no longer enough!

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