Have you ever stared at the large LED screen with rolling interest rates in a daze when doing business in a bank? Have you ever wondered how these displays that work day and night control the switches? Today we will take a look at this operation method that seems simple but actually has hidden secrets. To be honest, finding the switch on the bank’s LED screen is more exciting than finding the hidden camera in the ATM!

Three hiding places of physical switches

Don’t think that turning off the screen is as simple as pressing the power button! Bank LED screens usually have three physical control methods:

​​1. Equipment room secret door​​
• 90% of outlets will hide the main control switch in the maintenance channel next to the VIP room.
• You need to use both the access card and password to enter, which is one level lower than the security level of the vault.
• The door handle of the equipment room of a provincial branch even has a fingerprint scanner. People who didn’t know it thought they were on a science fiction set.

​​2. Backend management system​​
• Nowadays, smart screens are connected to the bank’s intranet, and tellers can operate them from their office computers.
• There was a joke at one website: the new intern accidentally clicked the shutdown button, and the entire lobby instantly went black.
• ​​Key points:​ ​Backend control requires level 3 permissions. Ordinary tellers can only adjust the brightness.

​​3. Emergency power-off device​​
• Red emergency buttons are usually installed in the president's office or control room
• In the event of a short circuit, smoke, etc., you can cut off the power supply to the entire display screen by taking a photo.
• Remember! If it's not an emergency, just press this thing randomly and wait for the inspection report to be written.

The technology of remote control

Do you think turning off the screen means turning off the power? So naive! Today’s high-end LED screens perform these tricks:

​​Intelligent timing system​​
• The screen automatically turns on at 7:30 on weekdays and fades to standby at 20:00
• Holiday mode can preset the switching time three months in advance
• The screen of a branch in a coastal city will automatically shut down when encountering a typhoon warning, which is more sensitive than weather forecasts.

​​Environmental sensing black technology​​
• The light sensor automatically adjusts the brightness according to the light and darkness of the lobby, saving up to 40% of power.
• When the flow of people falls below the threshold, the screen will enter a semi-sleep state.
• Models with temperature protection will automatically shut down if the chassis exceeds 60°C.

​​Mobile terminal control​​
• The mobile APP of the regional person in charge can remotely turn on and off the screens of all outlets within the jurisdiction.
• When a heavy rain flooded the equipment room, engineers from the headquarters were able to operate it even though they were halfway across China.
• The security mechanism is extremely strict: face recognition + dynamic password dual authentication are required

Question and answer time

​​Q: Why not design a more obvious switch? ​ ​
A: The first priority for bank equipment is to prevent theft and vandalism. Some outlets once installed switches on the side of the counter, but naughty kids mistook them for game console buttons and pressed them randomly. The current new solutions are physical switches + software locks with double insurance.

​​Q: Will a sudden power outage burn the screen? ​ ​
A: Don’t worry about a good screen! Professional-grade products have surge protection devices. Test data from a certain manufacturer shows that they can withstand 300 consecutive violent power outages. However, doing this for a long time will still shorten your life, and you have to go through the system process to shut down normally.

​​Q: Can I change the settings of the screen I bought from my bank? ​ ​
A: It depends on the situation! If it is a normal information screen, the branch director has the authority to fine-tune it. If it is a special screen with foreign exchange quotation or monitoring integration, the technology department of the head office will have to send someone with a dongle to operate it.

Editor's opinion

Lao Wang, who has worked in bank equipment maintenance for ten years, told me that he is most afraid of two types of people: curious babies who press switches randomly and new employees who can't find the switches. Today's LED screens are no longer silly, black and thick electronic boards.​ ​A smart terminal that integrates the Internet of Things, AI algorithms, and environmental awareness​ ​. Next time you go to the bank and find that the big screen is dark, don’t rush to call the security guard - it may be that the system is automatically updating, or the sun is too bright and triggers smart dimming. The knowledge of shutting down this thing is much deeper than the art of spitting out money from an ATM machine!

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