Hey, are you also staring at the subway station at the red arrival prompt screen and staring at the subway station? Or are you distracted when you are queuing in the bank? These seemingly simple devices all have great knowledge! Today, let’s talk about the seemingly simple but actually focused question of “where is the monochrome LED display switch”, so that you can slap your thighs after listening to it – it turns out that the mystery is here!

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Does this thing really need a switch?

Let’s be honest, now 90% of the monochrome LED displays on the market are on standby 24 hours a day. Take the arrival prompt screen of the subway station for example, guess what? They don't have physical switches at all! This is because: - ​**​Intelligent sensing system**​: Automatically start and stop after being connected to the train operation timetable - ​**​Remote control module**​: The background can adjust the display content at any time - ​**​Low power consumption characteristics: power consumption is comparable to energy-saving bulbs in standby state But then again, if there is maintenance, engineers still have a way. Last year, when a subway station in Shenzhen upgraded its equipment, technicians demonstrated: lift the dust cover in the lower right corner of the display, and there is a reset button the size of a fingernail is hidden inside. Press and hold it for 5 seconds to enter maintenance mode.

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Switch treasure map for conventional equipment

If you are now staring at the unit's LED information screen to find the switch, remember these three golden positions: 1. ​**Border dark grid**: Especially the bottom border, try to fumble along the metal edge with your fingers 2. **Inside the control box**: Some models integrate switches into signal receivers 3. ​**Remote control terminal**: It is now popular to control switches through mobile APP For example, the switch is commonly used by banks to call the number display screen, and the switch is designed with a clever design - there is a locked maintenance door on the back of the display screen. After opening it, you can see two red and green buttons. Green is the main power supply and red is the emergency power outage. This design is both safe and convenient for maintenance. I heard that the installation complaint rate of a certain brand of equipment in the Korean market has dropped by 62%.

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Weird design for special scenes

Have you ever seen a giant timing screen installed on the roof of a gym? The switch positions of these high-altitude devices are very particular: - ​**​Dual control system**: Ground console + equipment body emergency switch - ​**​Waterproof treatment**: The switch knob comes with silicone sealing ring - ​**​Anti-touch design: Two keys need to be pressed at the same time to start Last year, a stadium renovation project made a joke: a new electrician looked for a switch for a long time, but found that he had to use a magnet to hold a specific position before the hidden buttons would pop up. This patented design is said to extend the life of the equipment by 3 years, after all, it reduces the probability of misoperation!

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Can't find the emergency plan for Beishi

If you really encounter a situation where you can’t find the switch, remember these three steps to save your life: ① Check the device nameplate (usually attached to the side or back) ② Look for an English logo with the words "POWER" ③ Contact the manufacturer to obtain the electronic version manual Here is a cold knowledge: many high-end models now support the voice-controlled switch! You can wake up by shouting specific command words to the display screen, but you have to use the registered administrator voiceprint. I heard that this technology has been implemented in some smart parks, and the on-off response speed is controlled within 0.3 seconds.

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Hidden tips for maintenance

Finding the switch is only the first step, and how to use it is the key. Let me give you a few key points: - ​**​Start the order of power-on: Turn on the control computer first, then turn on the display power supply - ​**​Notes on shutting down the machine: It is best to turn off the machine every day after turning it off every day. - ​**​Cleaning taboos: Never spray cleaner when power is on There is a case that is particularly interesting: the price tag screen of a supermarket chain always fails. Later, it was discovered that water flowed into the gap of the switch when the clerk wiped the screen with a wet rag. The manufacturer later improved the design and raised the switch position by 15cm, and the failure rate immediately dropped by 70%.

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Speaking of this, you may wonder: It’s already 2023 now, why are there no unified switch positions? If I want to say, this just reflects the progress of the industry - different scenarios require different solutions. Just like our air conditioning remote control, some people like button layout, while others are used to mobile phone control. The key is to find the most suitable way to use it.

Next time you see the flashing LED displays on the street, you might as well pay more attention to their edges and corners. Maybe one day I discovered some novel design and could show off to my friends: "See? This switch position is very particular! "After all, life is full of knowledge, do you think so?

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