Have you encountered this situation? The newly installed LED large screen stood there like a dumb, and more than a dozen workers were spinning around the control cabinet, but they couldn't find the boot button. On the day of opening a shopping mall last year, Lao Wang, the engineering manager, was sweating with anxiety - the million-dollar advertisement was not on, and finally found that the operator regarded the control box as a distribution box.​​In fact, 80% of the startup problems are ignoring these three positions​​。

1. Positioning misunderstandings that novices often make

I've seen too many people make these three mistakes:

1. ​​Fight the screen borders​: Nowadays, LED screens no longer have physical keys installed on the outer frame, and it is useless to touch the corners.
2. ​​Misrecognition signal receiver​: The small box with an antenna is actually a wireless transmission module
3. ​​Ignore hierarchical startup​: Large screens need to open the distribution box first, then start the control system, and finally operate the sending card

There is a cold knowledge: the 2023 industry report shows that27% of after-sales work orders are false failures caused by misoperation​​. Just like the misunderstanding at a car show last week, the engineer took the high-speed rail to conduct cross-provincial maintenance, but the power supply sequencer was not turned on.

2. Hiding map of the boot button

​​The first stop: The mystery in the distribution cabinet​
Today's smart screens usually hide the main switch on the second floor of the distribution cabinet. Pay attention to the timing power controller with the "POWER SEQ" logo. Here is a trick: wait 30 seconds after hearing the "click" of the relay to allow the capacitor to complete pre-charge.

​​The second station: the small agency that sends the card​​
In the control computer case, find a black box with HDMI interface.​​Focus on the dial switch in the lower right corner​​, pushing it to the third gear in the ON direction is the power-on state. Don't laugh, some customers really break this as the brightness adjustment button.

​​The third stop: the virtual keys in the software​
The latest control systems are started with software instead, and find the lightning icon in the operation interface. Here is a reminder:​The IP address binding must be completed to activate, otherwise the mouse will not respond.

3. Emergency situation handling

Don't panic when the physical key is damaged. These three tricks can help:

1. ​​Mobile APP direct connection​​: Scan the QR code of the device to download the control software, and use Bluetooth/WiFi to turn on the computer remotely
2. ​​Short-circuit start method​: Use a screwdriver to short-connect PWR+ and PWR-contacts on the control panel (professionals only)
3. ​​Hot plugging method​: Unplug and send the card three times in the live state, and some devices will be forced to start

Last year's New Year's Eve Gala had a thrilling scene - the water inlet of the main screen control box failed. The technical team used the mobile APP to start the backup system and lit the screen 20 seconds before the countdown.

Ask and answer

Q: Why are the current switch designs so anti-human?
A: Actually, it is to prevent accidental touch. Places like stadiums, it is necessary to prevent the audience from pressing randomly before they can create a hidden design.​​Now, high-end screens have been activated by facial recognition.​, unauthorized personnel cannot find the boot portal.

Q: What should I do if the screen flashes after turning on?
A: First check whether the brightness setting exceeds the maximum limit value. There is an emergency skill:​Press and hold the + and - keys of the control box at the same time for 5 seconds​, can automatically restore factory brightness parameters.

Q: Will you not be able to turn on the machine if you don’t need it for a long time?
A: Don’t use it for more than three months, remember to disconnect the main power supply. A theater screen strike last month because the capacitor cannot be activated due to long-term dormant. This situation requires professional equipment to wake up the capacitor.

Exclusive data: 2024 industry survey shows that​Optional LED screen with intelligent switch system, saving an average operation and maintenance cost of 18.6 yuan/square meter/year​. After a chain supermarket replaced the induction switch, the annual electricity bill of a single store saved more than 27,000 yuan.

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