Hey! Recently I heard that Lao Zhang spent 80,000 yuan to buy a second-hand LED large screen, but half of the lamp beads were blackened after only three months. This thing shocked me, let’s talk about it today​ ​Where to buy second-hand LED large screens​ ​Is that reliable?

1. Reliable channels start from the bottom

​​"There are so many second-hand platforms on the Internet, which one can really pick you up? "​ ​ It depends on what level of equipment you want:

• ​​Engineering grade equipment​ ​: Go to a professional auction house to dispose of the assets of closed companies. Last year, a batch of P3 screens were dismantled from sports venues in Shenzhen, and the average price was only 35% of new products.
• ​​Commercial grade equipment​ ​: Inventories that are resold by regional equipment leasing companies, usually used for less than 8,000 hours
• ​​emergency equipment​ ​: You can find items for personal resale on second-hand websites in the same city, but the goods must be inspected on site.

​​Channel comparison table​​：

There is a little trivia:​ ​With original serial number​ ​The recycling price of the equipment can be 15% higher, which is a trump card when bargaining!

2. Essential skills for machine inspection

​​"How can I tell if the screen is about to expire? "​ ​ Remember these three tips:

1. ​​Lamp bead detection method​ ​: Use the mobile phone camera to face the screen. If a scan line appears, it means the refresh rate is ≥1920Hz.
2. ​​Temperature difference test​ ​: Touch the heat sink 1 hour after turning on the computer. If the temperature difference is >15°C, run away immediately.
3. ​​Grayscale challenge​ ​: Play back 256-level grayscale images. Only those who can clearly see the 8th level are considered qualified.

Here comes the point! ​ ​IP65 protective screen​ ​To do a water spray test on site:

• Use a watering can to spray water at a 45 degree angle for 5 minutes
• There should be no moisture at the seams of the border
• The control system must have a waterproof box

Last month, a friend bought an outdoor screen and did not do this test. As a result, it short-circuited when it rained. The repair cost was more expensive than buying the screen!

3. Crack all hidden traps

​​"What clauses in the contract may lead to minefields? "​ ​ Be sure to avoid these pitfalls:

• ✘ It says "Dot pitch adaptation is not included" - you may be able to buy non-standard modules
• ✘ ""Brightness is delivered as is" - outdoor screens may be adjusted to indoor parameters
• ✘ ""Control system not included" - buying accessories later may cost 30% more

Let me teach you a tough trick:​ ​Request seller to provide colorimeter report​ ​, a screen with a ΔE value > 5 is absolutely unacceptable. Then look at the power cabinet——​ ​Dual redundant power supply​ ​The configuration can extend the service life by 3 years, and the price of a single power supply is reduced by at least 20%!

Let me tell you, shopping for second-hand screens is like going on a blind date - you can't just look at the appearance, you have to test the "inner beauty". Next time you come across a piece of equipment that is advertised as "95-new", remember to let it play a 4K video live. If it freezes more than three times, you won't get it for free! After all, the money saved is not enough for later maintenance, don’t you think this is true?

for more product information and pricing, please contact us .