Oh, are you wondering if this is a matter? The three-story-high large screen at the entrance of the mall suddenly turned black as it was broadcast. Last week, Lao Wang and his friends held a concert, and the main screen of the stage "sleep" while singing, which made the director so anxious that he almost dropped the walkie-talkie. What's going on with this LED large screen? Let's break it apart and say it.

The first trick: First see if this guy is lazy

You must have encountered a situation where your phone cannot be charged, right? A large-screen power system is much more complex than a mobile phone. First touch the shell of the distribution box. If it is so hot that it can fry the eggs, it is 80%Power supply module overheating protection​Start. The case in the exhibition center last year was a typical example - an electrician connected the 380V cable to the 220V interface, and the power manager went on strike directly. Do you think this can not be a black screen?

Let me teach you another unique skill: bring a multimeter to measure it​Voltage fluctuation value​. During normal operation, the fluctuations should be controlled within ±5%. If it exceeds 10%, it is like riding a roller coaster. Of course, the screen should be "motion sick" and the food should be stopped. There is a very interesting data,43% of abnormal power outages are caused by unstable voltage​​, more than you think?

The second trick: Check if the cooling system is pretending to be sleeping

In this summer, everyone knows that turning on the air conditioner, and the LED screen cooling system is so delicate. Take an infrared temperature measuring gun to check the heat dissipation hole, which should be below 45℃. At a brand press conference last month, the cooling fan was blocked by a poster and the temperature soared to 68℃. As a result, it automatically shuts down every half an hour. Are you embarrassed?

Take a look at the key pointsFan speed​, many screens now have intelligent speed regulation function. If the speed is fast and slow, it is like a rush, check the control board quickly. A maintenance master told me,​Cleaning dust can solve 31% of heat dissipation failures​​, this is much more cost-effective than replacing parts.

The third trick: Take a look at the "highway" of signal transmission

It’s already 2024 now, and there are people using VGA cable to transmit 4K signals. This is like driving a sports car and walking on a dirt road in the countryside. How can there be no problems? First, check whether the signal source output matches the screen resolution, and don't fix those fancy format converters. The black screen accident at last year's New Year's Eve party was finally found out that the HDR format screen output by the director station was not recognized.

Teach you a professional operation:EDID Reader/writer​Detection of signal handshake. Sometimes the oxidation of the HDMI interface will cause intermittent signals, which is the most annoying problem - sometimes good and sometimes bad, the most difficult to check. Data shows that67% of the black screen caused by signal problems occur in the interface link​, didn’t expect it?

Personal opinion time

I have to say that the current LED screen is like a smartphone, the stronger the function, the more hidden the problem. But no matter how things change, remember these three key points:​Power power is like the heart, heat dissipation is like breathing, and signals are the nerves​. Two days ago, he chatted with a master, and he said that the most awesome technique now is​Intelligent prediagnosis system​​, it is much better to predict failures 7 days in advance. Guess what? If you use this system screen, the maintenance fee will be cut in half. This is the true fragrance law!

for more product information and pricing, please contact us .