Xiao Wang, who just took over the maintenance of LED screens in the mall, was about to go crazy - he was in a hurry to update the program list but couldn't find the USB interface. Finally, he found that the interface was actually hidden under the waterproof cover! I have seen too many such embarrassment, and today I will teach you how to crack the metaphysics of this industry step by step.

​​1. The four major sects that are hiding in the interface​​
Touch the screen border and can't find it? Remember these permanent locations:

• ​​Right maintenance port​​: 85% of commercial screens have holes here, and the metal cover with spring card needs to be lifted
• ​​Bottom heat sink​​: Some ultra-thin models will make hidden push and pull compartments (note the grooves with the 🔌 logo)
• ​​Split gaps​: Mostly used for rental screens, reserved at the joints of the 3rd and 4th blocks
• ​​Rear on the remote control​: This design is the most anti-human! But there are indeed manufacturers doing this

Last month, a gymnasium made a joke: the engineer climbed with a ladder for half an hour, and the interface was in the console drawer. Now all high-end screens are equipped with standard​Red light indicator​, it is clear at a glance in the dark environment.

​​2. Interface type hidden cost traps​
Don't think it can be used just by plugging in. If the interface specifications are incorrect, it may burn the motherboard:

All colleagues who have suffered losses know that last year a commercial center has lost the screen because it forced the USB 3.0, and the repair fee is enough to buy a new screen. Now those who know the knowledge require manufacturers to matchDual interface redundant design——Type-C+ dual backup of aviation heads is the king.

​​3. Legal risks in anti-ignition design​
Do you still remember the case of the defendant who was inserted into the wrong interface? Teach you three ways to avoid risks:

1. Confirm that there is a ​ next to the interfaceVoltage identification sticker​(Look carefully at 5V/12V)
2. The interface with waterproof glue plug should be first​Press and rotate​To open
3. Stop immediately when encountering the nine-pin custom interface - this thing will burn the chip if it is connected instead

There is a tricky operation worth learning:Magnetic adapter​Replace direct insertion, it can prevent misplugs and facilitate maintenance. A chain store saved 120,000 yuan in accidental repair costs in two years using this trick.

​​IV. Data update life and death line​
Don't make these two mistakes when you are in a hurry to publish the publication:

• ​​Hot plug will die​: First press the "Uninstall Storage Device" option in the screen menu
• ​Format killer​: FAT32 format is the safest, and the NTFS format cannot be recognized
• ​Virus Protection​: Before inserting, use a military-grade anti-virus USB drive (the ordinary USB drive has a toxicity rate of 37%)

Last year's Double Eleven promotion season, a certain mall broadcasted a competitor's advertisement on the screen, which was to use the USB drive of the front desk computer. Now all professional teams are equipped with standard​Read-only mode USB drive​​, you don’t have to worry about writing data if you insert the wrong interface.

The most outrageous design I have ever seen: the USB interface of a certain model of screen actually needs to be removed to see it! So now the contract must be signedInterface Visualization Terms——All interfaces must be marked with fluorescent markings on the housing. This line of water is too deep, remember a truth: when you can’t find the interface, you should look for the installation drawings you originally did. If you can’t find the drawings, you should be blessed... Please be blessed.

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