Have you encountered this situation? The newly installed LED screen suddenly became black, and I was so anxious that I was sweating all over my hands, but I found that I couldn't understand the entire English. It would be great if you could find the rest key and restart it at this time - but where is the broken key hidden? Don’t panic. Today we are like looking for a remote control at home, turning the "life-saving button" of the LED screen upside down.

​​Let me tell you a real lesson​​. Last year, a shopping mall debugged the large screen before opening. Seven technicians circled the control room for three hours, but failed to find the emergency restart button. Later I found that the device had no physical buttons designed at all! This tells us: Not all LED screens have that small round button, the key depends on the product type.

The mainstream equipment on the market is now divided into three categories. Let’s compare it in the most straightforward way:

There is a cold knowledge that may subvert cognition:​​High-end LED screens are eliminating physical buttons​​. Just like today's smartphones cancel the headphone jack, the new generation of devices have been switched to software control. For example, some outdoor advertising screens will directly push the restart command remotely when they encounter a crash, and there is no need to climb the ladder to press the physical key at all.

Here is an important reminder: Never poke the paper clip! The most outrageous case I have ever seen, someone used the HDMI interface as a reset hole, and the entire receiving card was burned. The correct way is to confirm the device model first - usually there are structural diagrams in the official website download area, or directly contact the after-sales service to position the diagram.

​​The key point is here​​! How to quickly determine your device type? These three characteristics are recorded:

1. Check if there are small holes with lock marks next to the power supply interface (the clamping may be required to trigger)
2. Check if there is a red button for "emergency recovery" in the control software
3. Observe whether there are any drops when starting - drops - two prompt sounds (models with self-test function)

Suddenly I thought of a key point:​​Brightness intelligent adjustment technology​​The popularity of this makes things more complicated. Some screens will automatically standby according to ambient light, and novices are easily misjudged as dead. At this time, what should be done is not to find the reset button, but to try to cover the light sensor probe with your hands - if the picture is restored, quickly adjust the automatic brightness threshold.

Speaking of the latest solutions now, many manufacturers have begun to play "integrate software and hard". For example, remote restart through the mobile APP, or setting the double-click on the power button to trigger reset. Here I would like to remind you: When you encounter a reset key that needs to be removed to operate, tens of millions! Tens of millions! You have to turn off the power first! I have seen live operations that ignite the circuit board, and the sparks are more exciting than firing fire during the Chinese New Year.

Editor's opinion: Instead of trying to find that small button, it is better to let professionals do professional things. Next time there is a problem with the equipment, take a deep breath and shoot a video of the fault to send it to the technician - maybe someone can do it by just moving the mouse, why force yourself to become a master of dismantling the machine?

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