Alas, have you encountered this situation, bosses and masters? The LED screen that had just been installed in the mall was suddenly half black. I was in a hurry to take it apart but couldn't start - where to plug the screwdriver into? How to pull the thread end? I was afraid that I would scrap the screen that cost tens of thousands of yuan with all my efforts. Let’s talk about this hard-core topic today, and you can become an “experienced driver of screen removal” after reading it!

1. Three-piece set of life-saving before disassembling the screen

​​1. Power off! Power off! Still power off! ​ ​
No matter how anxious you are, touch the power switch on the wall first. Last year, a repairman in a shopping mall operated with electricity. When the screwdriver hit the motherboard, the repair fee soared from 3,000 to 30,000. Remember: the screen is not removable, and the screen is not removable when it is removable!

​​2. Don't make do with tools​​

• ​​Anti-static bracelet​​Must wear (the human body's static electricity sends the chip away directly)
• ​​Precision screwdriver set​​It is necessary to bring a magnetic head (it will be a tragedy if you drop a screw into the circuit board)
• ​​Suction cup holder​​Have to prepare two (a 20 kilogram screen is not a joke)
  The most outrageous operation I have ever seen: pry the outer frame with a kitchen knife, and cut the waterproof glue strip into spicy strips...

​​3. The site layout is exquisite​​
Lay two layers of dustproof pads and place water cups and tools within two meters around. The entire dust-free environment with conditions - dust drills into the gaps of the module, and the picture immediately turns into a snowflake screen.

2. Unboxing step by step

​​Step 1: Break the shell seal​​

1. Find all fixing screws (common locations: four corners + middle of upper and lower borders)
2. Use the T8 plum blossom knife to rotate counterclockwise, pay attention! Some screws are anti-theft designs that require pressing and twisting
3. When encountering the snap structure, don’t break it hard, use a spudger to cut it from a 45-degree angle (the same principle as opening the car door)

​​Step 2: Disconnect the lifeline​​

1. Take a photo before unplugging the power cord (remember the red and blue wire sequence)
2. The signal line should be "shaking": gently shake left and right and slowly pull it
3. When you touch the stuck interface, drop two drops of WD-40 lubricant for five minutes

​​Step 3: The method of module separation​​

1. First remove the fixed buckles at both ends (the ones with springs must be pressed)
2. Hold the bottom of the module and move outward in parallel (tilt exceeds 15 degrees may damage the cable)
3. If you encounter viscose residue, don’t use a knife to scrape it! Apply some glue remover for ten minutes

3. Ranking of common deadly operations

Data comes from the 2025 Electronic Repair Industry Report

Last month, a hot pot restaurant owner disassembled the screen and cleared the dust by himself, but the cooling fan was installed in the reverse direction, and smoked directly after three minutes of turning on the machine. So, professional things still have to...

4. Soul questioning: Do you have to tear it yourself?

Q: Isn’t it just a few screws to remove? It’s useless to spend more money to find a master!
A: A big mistake! Regular disassembly and assembly involves at least three major professional operations:

1. ​​Torque control​​: The tightness of each screw has a torque standard (the light will leak if the error exceeds 15%)
2. ​​Reset cable​​: The 54-pin interface must be aligned to the millimeter level, and the signal will be interrupted if it is a little bit crooked.
3. ​​Airtightness detection​​: Negative pressure test should be performed after reorganization to ensure that the waterproof performance does not degrade

A real case: A stadium dismantled the rental screen and saved 500 labor costs. But when it was put back, it was found that it was dust. Before the performance, it was urgently repaired and paid 20,000 yuan in liquidated damages!

The editor takes a brick

After working in the technology for ten years, I am most afraid of hearing "I tried to tear it myself." Nowadays, high-end LED screens are all modularly designed, like the latest model of quick-release box, professional tools can be disassembled and installed 10 square meters in three minutes, but the free hand prying may scrap the aviation plug.

Recently, a new trend has emerged in the industry - remote guidance for disassembly and assembly. Last week, it helped overseas customers remove a special-shaped screen through AR glasses, and it took only 47 minutes from diagnosis to completion. So, if you really have to do it yourself, at least find a technician to watch it, save your life and screen!

Having said that, many manufacturers now provide lifelong maintenance services, which is much more cost-effective than doing it alone. Next time I feel like I'm going to disassemble the screen, touch my wallet first and then make a decision?

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