Alas, have your LED screen encountered such bad things? I don’t know who has secretly changed the content of the advertisement to a strange emoticon package. Last week, a friend who opened a supermarket complained to me that the large screen at their door was connected to Bluetooth to play ghost videos in the middle of the night, and the next day, he was directly complained by customers... Today we will talk about this life-saving skill--​Where to set the display motherboard password?​！

1. The metaphysics of the location of the motherboard password lock

First of all, you have to figure out what your display is. On the market​70% of the LED screen motherboard password settings are hidden in the lower right corner​​, but some high-end models love to play with flowers. Teach you a trick:

1. ​​In the event of power outage​​Reveal the rear panel and find a 6-pin connector with the words "SET" or "PWD"
2. ​Models with touch screen​, try connecting the upper right corner 5 times in the screen calibration interface
3. ​​Lease screen​Usually, the password chip is hidden next to the power socket (4 Phillips screws need to be removed)

​​Give a real case​: Last year, the P3 screen used by a chain of pharmacies was hacked because the manufacturer posted the default password on the shell. Later I found out that the attacker actually tried it with the password 123456. Are you angry?

How to build a Level 2 and 3 password protection system

Don't think that everything is fine if you set a password! Professional operation and maintenance​Triple-fold composite protection​：

​​1. Basic password layer (anti-no-white)​​

• Enter the starter password for the settings menu, it is recommended to change it every quarter
• Never use birthday/mobile phone number, it only takes 2 minutes for hackers to crack this combination.

​​2. Physical locking layer (defending insiders)​​

• After unplugging the motherboard jumper cap, even if you know the password, you cannot modify the parameters.
• Important projects can be installed on the motherboardFingerprint lock module​, now domestic products are only 380 per set

​​3. Network isolation layer (anti-hacking)​​

• Change the WiFi module of the control card to a 4G version that requires U-shield verification
• The transmission protocol must be encrypted with AES256, and do not use old TCP/IP.

3. What should I do if the password is lost? Three first aid moves

​​Scenario 1: Remember the original password​
Go to Advanced Settings → Security Center → Password Management → Select "Clear All Permission Passwords". Notice! This operation will reset the brightness curve parameters together, and it is recommended to backup in advance.

​​Scenario 2: Forgot the password but can be disassembled​
Find the CLR contacts on the motherboard and short-circuit them with tweezers for 5 seconds to restore the factory settings. However, after doing this, we have to make a point-by-point correction, and it will not be able to get off in less than 3 hours.

​​Scenario 3: Neither you have a password nor dare to disassemble it​
Contact the manufacturer for providing​Equipment serial number + purchase voucher​, regular manufacturers have emergency password libraries in the cloud. But be careful of counterfeit factories, they can't remember their passwords...

4. Protective cold knowledge that experts know

1. ​Temperature Trap​: Turn the temperature probe next to the password memory chip to 60℃ to trigger the protection. If someone forcibly disassembles the machine, it will automatically lock it.
2. ​​Fake menu tricks​: Make two password portals in the system settings. If the false ones are recorded, the number of input errors will be recorded.
3. ​​Laser coded anti-counterfeiting​​: Spend 200 yuan to engrave the exclusive QR code on the motherboard, and scan the code during maintenance to obtain the modification permission
4. ​Time lock gameplay​: Set the parameter modification prohibition from 18:00 every day to 8:00 on the next day, which is suitable for preventing damage after closing of the mall.

The editor's experience of blood and tears being tricked

Last time I installed a large auditorium screen for the school, but I didn’t change the default password in order to save trouble. As a result, the naughty children used their mobile app to connect to the screen, changing the background of the opening ceremony to the "Honor of Kings" game interface... Now that I have learned it well, I will install all projects.Two-factor authentication——Not only do you have to enter the password, but you also have to insert a U-shield to change the settings.

If I really want to say, instead of changing the password every day, it is better to lock the motherboard in when installing it.​Trump box with camera​​. Now this kind of smart cabinet is only a thousand yuan, but it can save at least 80% of the operation and maintenance disputes in the later stage. Do you think it is worth it?

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