Oh, are you weird? Yesterday I passed by the mall, the three-story advertising screen suddenly became black, and the repairman was busy in the air with a rope hanging on it. This reminds me of something-​​In fact, 90% of LED display failures occur in several fixed parts​​! Today I will take you to explore these "fragility points" and teach you how to extend the life of the screen. I have seen it with my own eyes. Some screens have been used for five or six years and are still the same as new. Some have just been installed in the repair room for three months. The difference is whether you understand these tricks!

1. The five "patients" that are most likely to strike

​​1. Power system: The "heart" of the display​
Why do outdoor advertising screens always have problems during thunderstorms? Eighty-mostly the power module is affected! During the typhoon season last year, we replaced 32 power boards for Tokyo Stadium, but the fuse was burned due to unstable voltage. Remember these three red flags:

• The screen flickers like a dick
• Colorful ripples appear on the corners
• Control card restarts frequently

​2. LED light beads: "Black sheep" in 30,000​
Although the lamp bead is only the size of rice grains, it is the "face" of the display screen. Last month, the transparent window screen of a department store in Seoul went on strike because of five blue light beads, and the entire screen looked faded. Teach you a test trick:
→ Use your palm to move slowly close to the screen
→ Observe whether there is any abnormality in the fever at a fixed location
→ Use your mobile phone camera to capture the screen to view the dark spots (the fault that is difficult to distinguish with the naked eye appears)

​3. Signal interface: "Big Throat" for data transmission​
Those who always complain about screens of flowers and splashing, don’t rush to change the screen! Last year, the curved screen at Singapore Airport failed and finally found out that the aviation plug was in the cockroach... The three-piece interface maintenance set is ready:
✔️ Precision electronic cleaner
✔️ Anti-oxidation silicone sleeve
✔️ Multimeter (to measure contact resistance ≤0.1Ω to pass)

​4. Thermal system: the invisible "invisible killer"​
Why is the stage floor tiled screen easy to burn the driver IC? The ground temperature at 50℃ in the performance is not a joke! The actual data shows:

• Every time the temperature rises by 10℃, the life of the lamp bead is reduced by half.
• Poor heat dissipation will increase the color difference by 30%
• The aluminum substrate deformation exceeds 0.5mm and will cause failure

​​5. Control card: The screen's "brain crashes"​
Have you ever encountered the screen jumping around by yourself? Eighty times it’s because of the virus in the control card! Our technology department recently intercepted a new virus specifically attacks the WiFi module of the rental screen. Keep the key points of protection in mind:

• Regularly update firewall firmware
• Physical locking alternate interface
• Disconnected from the Internet before the performance

2. Comparison table of "high-risk areas" in different scenarios

​​Special case warning​：

• Seaside project: Salt spray corrosion can cause the interface to rust for three months (countermeasures: gold-plated interface + nitrogen seal)
• High altitude area: UV accelerated lamp bead aging (countermeasure: nano-blue-proof film)
• Extremely cold areas: -30℃ will delay the power supply starting (countermeasure: preheating device)

3. The master’s maintenance notes

Recently I encountered a strange case: the poster screen in a shopping mall "twitches" every two hours. After checking for three days, I found that the automatic brightness sensor was pasted with advertising paper! So,Sometimes the cause of the failure is more nonsensical than you think​。

Nowadays, LED screens are no longer a matter of plugging in. Take the 86% transparent screen we made for South Korea as an example, which has built-in​Dual-channel self-test system——Which lamp bead is going to strike, call the police in the background 72 hours in advance. This intelligent prediction technology was set in a science fiction film three years ago!

Editor's opinion: Instead of waiting for the broken down before repairing, it is better to do a "physical examination" on a daily basis. Like our 24-hour online technical response center, we can remotely monitor the screen health of global projects. Remember this formula:​Preventive maintenance cost = 1/5 of repair cost​. Next time, I see a problem with the screen. Don’t rush to scold the manufacturer. Think about when the last maintenance was first?

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