Xiao Wang, who just started his business and wanted to save costs, was so anxious that he scratched his head recently - the mall opened to install large LED screens, and new equipment was often hundreds of thousands, and the second-hand market was mixed with good and bad luck. Guess what? Last month, he spent 80,000 yuan to buy the "90% new" screen. After installing it, he found that the color difference was as serious as a palette that was overturned! Let's talk about it today.​ ​How can ordinary people find real treasures in the second-hand market​​。

1. Where are the second-hand LED large screens hidden?

Let's talk about some experts first.​​Hide channels​​：

• ​​Equipment rental company warehouse​​: The easiest way to find a bargain when clearing inventory at the end of the year. Last year, a leasing company in Guangzhou sold 200 square meters of P3 screen at half price
• ​​Exhibition evacuation site​​: Those active screens that only used for 3 days have better performance than home TVs
• ​​Manufacturer replaces inventory​​: When technology is upgraded, old equipment will be released at a low price, which is 10 times more reliable than second-hand dealers

​​Give a real case​​: A shopping mall in Shenzhen won a batch of customized screens returned overseas at a market price of 40% through an industry exchange meeting last year. The inspection found that there were only slight scratches on the outer frame. Do you understand? A poor information means saving money password!

2. A big competition between the advantages and disadvantages of five major channels

Let's take a walk with the common path:

​​Lessons of blood and tears​​: The screen bought by an educational institution on a second-hand platform was scrapped after three months of use, and the repair fee was more expensive than buying new equipment. So,​ ​Half the right channel selection​​！

3. Experts teach you three tricks to test the machine

Don't believe in the "90% new" label, we have to do it ourselves:

​​The first trick: Testing method for white paper​​
Let the seller play a completely white picture and take out A4 paper to stick it on the screen. The white of the authentic LED screen is almost chromatic and the paper, and the refurbished screen will turn blue or yellow.

​​The second move: temperature sensing​​
Touch the heat dissipation hole after half an hour of turning on:

• Slight heat (about 40℃): normal
• Hot (over 60℃): There is a problem with the heat dissipation system
• Bingliang: It may have been passive

​​The third move: dark room detection​​
Turn off the light and look at the black screen. The good screen should be as dark as if it was turned off. The light spots must be a defective product that has been repaired.

4. These parameters are more important than price

The easiest pit for beginners to take is just looking at the price! Remember this​ ​Four King Kong Indicators​​：

1. ​​Refresh rate ≥1920Hz​​: The bottom line of video shooting without flashing screens on mobile phones
2. ​​Brightness attenuation ≤15%/year​​: Requires the original brightness report
3. ​​Protection level IP65​​: Outdoor screen rain test must be done
4. ​​Color consistency >97%​​: Use a color calculator to measure nine areas

​​Industry shady​​: Some second-hand dealers will mix 5,000-hour and 20,000-hour modules, and this kind of screen becomes a "big face" after three months of use. So be sure to check the cumulative usage time of each box!

Editor's opinion

After eight years of equipment procurement, my biggest experience is just one sentence——​​Buying a second-hand screen is actually buying after-sales service​​. I worked with a manufacturer last year. The screen went wrong after half a year of use. They brought the backup module to replace it within 24 hours. This invisible value is much more important than saving tens of thousands of yuan. Now the new model screens all come with an intelligent operation and maintenance system, which can remotely monitor the life of the lamp beads. Don’t miss this technical bonus.

Finally, I will get a hard-core data: the market size of second-hand LED screens is expected to exceed 8 billion in 2025, but the compliance circulation rate is less than 35%. Next time, remember to bring this guide to ensure that you can dig out gold in the garbage dump!

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