"Want to buy a second-hand LED screen but are afraid of getting stuck? "This has been spoken to many people. Two days ago, I heard from my fellow staff member Lao Zhang that he spent 80,000 yuan to buy a second-hand P3 screen, and the color blocks appeared after three months of using it - the repair fee is 20,000 yuan more expensive than buying a new screen! Today, let’s talk about how deep the water in this second-hand market is, and give you some tips to prevent pitfalls.

Comparison of the three major channels of the second-hand market

To be honest, looking for a second-hand LED screen now is like opening a blind box, and the right channel is half successful. Let’s sort out the business methods of this industry, and you will understand how to choose after reading it:

To give a real case: Last year, a shopping mall in Hangzhou bought a 200㎡ P4 screen from a recycler, and 12% of the modules were mixed in different batches, resulting in a significant color difference. Later, I found a professional testing agency and spent 36,000 more to match the lamp beads alone. ​ ​Key points: Sellers are required to provide "Lanzhu Batch Consistency Report" to avoid 80% of the pitfalls​​。

2. Five-step tips for on-site inspection

Don’t just listen to the seller’s tricks. It’s absolutely right to bring these five-piece sets to inspect the goods:

1. ​​Brightness tester​​(Check whether it is false)
2. ​​Thermal imager​​(Look at the temperature of the power module)
3. ​​Grayscale test chart​​(Find bad spots)
4. ​​tape measure​​(Measure the deformation of the box)
5. ​​multimeter​​(Test line aging)

Focus on the power box - the easiest thing to hide here. Last month, a second-hand screen bought by an event company in Guangzhou. The screen suddenly became black during rehearsal. When I opened it, I found that the power interface was sealed by hot melt glue. Later I found out that it was a scrapped piece that had been repaired by water inlet. Do you think it was annoying? ​ ​Remember the formula: touch the temperature, look at the seams, measure the gray scale, and check the seams for four pairs, and check the screws for six power​​。

3. Don't put these parts into

It is not impossible to buy a second-hand screen, but some parts must be replaced with new ones:

• ​​Power driver card​​: It must be replaced after more than 30,000 hours, otherwise the risk of burning the screen will increase by 7 times
• ​​Receive card cable​​: Direct pass for oxidation deformation
• ​​Waterproof glue strips​​: The outdoor screen strip has a lifespan of 2 years, so save this money and wait for the rain to leak

There is a lesson learned from blood and tears: A bar in Shenzhen is greedy for cheapness and did not change the receiving card, but the "ghost" special effect appeared during the performance - it was actually a signal delay. In the end, I paid the customer 80,000 yuan in liquidated damages, which was really like picking up sesame seeds and throwing watermelons. It is recommended to​ ​Replace core components​​List the fees separately and negotiate prices, don’t mess around with the total price.

4. Three tricks for price negotiation

There must be skills to bargain, and you can teach you three practical tricks:

1. ​​Check the boot time​​: Use professional software to read motherboard data, with half cuts of more than 15,000 hours
2. ​​See the repair traces​​: Each buckle with repair joints is 500
3. ​​Metering attenuation value​​: The attenuation exceeds 15% is calculated based on the residual value

Last year, a Suzhou company used this method to cut the P2.5 screen priced at 120,000 yuan to 78,000 yuan. The key is that they took third-party engineers to inspect the goods, and the seller dared not make a blind quote when he met someone who knew the knowledge. ​ ​Remember: Sellers who dare to bring you to inspect goods are serious business​​。

5. After-sales guarantee is discussed

Second-hand transactions are most afraid of "the disappearance of money and goods" and the contract must state these:

• ​​7-day no-reason return​​(Logistics fees can be borne by yourself)
• ​​30-day fault repair​​(Clear response time)
• ​​Provide original accessories channels​​(Prevent inferior products as good products)

There is a tough trick: ask the seller to deposit a 10% deposit for three months. This is how an exhibition company in Beijing operated, but in the second month, it was found that the color temperature of three modules was abnormal and exchanged for a new module with a deposit. ​ ​Don't make verbal promises, just count them in black and white​​。

6. See the future trend clearly

There is a new trend in the industry now: the surplus parts of rental screens have begun to flow into the second-hand market in large quantities. This type of screen looks new, but it is actually "fatigue parts" that are used at high frequency. There is a very scary data - the average lifespan of a rental screen is only 1/3 of that of a commercial screen! ​ ​Three key points are recommended: frame structure stiffness, number of plug-ins and unplugging times, box splicing accuracy​​。

Having said that, the second-hand LED screen market is like a world of things, deep but mixed. Personally, I think if you really want to buy a second-hand screen, you either find a refurbished machine with official certification or take a professional team to inspect the goods. After all, if the money saved is not enough to repair the screen, it will be a big loss. Finally, I would like to remind you: When you see the saying "customs fines and confiscations" and "project final orders", run quickly - nine and a half out of ten are pitfalls!

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