Is anyone else like me, whose hands are shaking when turning off the LED screen for the first time? I'm afraid that if I press the wrong key, hundreds of thousands of devices will be scrapped. There was a joke in a shopping mall in Chongqing last year - the electrician directly pulled the main switch to turn off the screens. As a result, all 18 modules had black screens the next day, and the repair cost was 230,000! Today I will teach you the correct power-off posture step by step. After reading this, I will ensure that you will no longer feel flustered and your hands will shake.

Turning off the power is not as simple as pressing a switch

Remember this first​ ​death taboo​ ​: Never pull the plug directly like in the TV series! LED screens are different from mobile phones. A sudden power outage is like a sudden brake, and it is easy to burn the driver chip. Last year, a music festival's floor tile screen suffered a power outage due to violence by on-site personnel, resulting in 87 receiving cards being reimbursed.

​​Correct operation in three steps​​：

1. ​​Close the content source first​ ​: Completely exit the computer or player software, just like sending a WeChat message by pressing send first and then locking the screen.
2. ​​Turn off the control card again​ ​: Find the control box hidden behind the screen, press and hold the power button for 3 seconds until the indicator light goes out (same as turning off an Apple phone)
3. ​​Finally cut off the main power​ ​: After confirming that all equipment has stopped running, turn off the air switch of the distribution box.

(Suddenly remembered) Pay attention to outdoor large screens! Models with IP65 protection must first close the waterproof cover and then turn off the power, otherwise moisture will easily enter during the rainy season. During a heavy rainstorm last month, a fence screen failed to pay attention to this detail, and the main board was destroyed.

Shutdown tips for different scenarios

​​Shopping mall atrium transparent screen​​：

• Before turning off the screen, adjust the brightness from 1200cd/m² to 500cd/m² and wait 5 minutes before turning off the power.
• Remember not to close the main gate directly! You must use the supporting central control software to perform the shutdown procedure.
• In a shopping mall, a cleaning lady accidentally turned off the power, causing permanent color difference on the transparent screen.

​​stage rental screen​​：

• For quick disassembly and assembly of the aluminum-magnesium-zinc box, you must wait for the cooling fan to stop after shutting down (about 2 minutes)
• In the event of an emergency, you can use the APP to execute emergency shutdown mode
• According to actual testing by a performance team, this function helped them save 45% of the disassembly and assembly time.

​​Stadium fence screen​​：

• For models with intelligent dimming systems, the automatic brightness sensing function must be turned off before shutting down.
• It is recommended to use UPS power supply to prevent sudden power outage from damaging the lamp beads.
• In an international competition, this solution extended the screen life by 3 years.

Death-seeking operations VS professional techniques

Key points to talk about​ ​long term power outage​ ​This matter. One store's poster screen was closed for half a year during the epidemic, and the screen immediately went black when it was reopened. Later, the technical guy taught me a trick:​ ​Choose a dry day every month and turn on the screen at 30% brightness for 2 hours​ ​. This is similar to the need to warm up a car when it is parked for a long time.

Editor’s experience of blood and tears

After eight years of engineering and installation work, I have seen too many weird shutdown methods. Let me say three things from the bottom of my heart:

1. ​​A good screen requires good habits​ ​: No matter how expensive the equipment is, it cannot withstand violent operation, just like driving a supercar and cannot step on the accelerator.
2. ​​Smart devices use intelligence​ ​: Nowadays, high-end screens are equipped with​ ​Cloud shutdown detection​ ​, don’t waste this function (it can detect abnormalities 30 minutes earlier than humans)
3. ​​Service is more important than technology​ ​: In case of emergencies, 24-hour online technical response is better than in-house engineers.

Finally, I would like to remind everyone: next time you see someone closing the door and shutting down the screen, be sure to rush up and stop them! What you save is not only a screen, but also someone else’s year-end bonus. Remember, a power outage is not the end, but the beginning of equipment maintenance!

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