Ouch hey! Have you ever encountered such a bad thing? The LED screen I bought for a lot of money failed. I called the after-sales service and asked, "What is the model?" Only then did you remember - you never noticed where the model is! Don’t worry, let’s break it up and say, “You’ll be clearer than the one who sells equipment after reading it!

1. Is the model label hidden more hidden than escape room?

​​Q: Where is this broken model printed?​​
Last year, I helped my friend deal with a real thing: the shopping mall screen was half blacked, and the maintenance team came and searched for half an hour before finding the model! In fact, there are only three common locations:

• ​​The back of the power box​​: Eighty percent of the equipment is attached here, but you have to climb a ladder to see it
• ​Control card tags​: On the receiving iron shell, it is usually blocked by a cable
• ​​Outer packaging side​​: Don’t throw away the packaging! The most tricky one has ever seen is that the model is only printed on the packaging

A restaurant owner complained to me that the screen model label he bought was actually inside the cooling hole! I have to put my phone in and take a photo. Isn’t this a tossing person!

2. Are the alphanumeric models and alphanumeric characters all heavenly books?

​Case warning​: A company bought P3.9 as P4, and spent 70,000 more in vain! You have to know how to decipher these passwords:

1. ​The letters at the beginning​：

   • ​​G​​=Solid screen​R​​=Lease screen​T​​=Transparent screen
   • If you see a belt​X​Mostly custom models

2. ​The middle number​：

   • ​​The number after P​​=Pixel spacing (unit mm)
   • ​​1920​​=Refresh rate ≥1920Hz
   • ​​800​​=Brightness 800cd/m²

3. ​Ending letters​：

   • ​​S​​=Standard Edition​Pro​​=High-end version​IP65​= Waterproof grade

Take a chestnut:​G-P3.9-1920-800S​​, this is a standard screen with a fixed version, 3.9mm dot spacing, high-refresh and brightness.

3. Is a screen without labeling a product without three?

Don't panic first! Last month, I helped an Internet cafe owner to help me, and all the second-hand screen models he bought were scraped. This is how we operated:

1. ​​Measuring pixels​：

   • Use a ruler to measure the distance between 10 lamp beads, except for 9, the distance between points
   • For example, measuring 39mm is P3.9

2. ​​View the control card​：

   • Receive card chip's software version number
   • Contact the manufacturer to report the software number and check the model number

3. ​Measure brightness value​：

   • Download Lux ​​Meter software on your mobile phone
   • Tested 2 meters away from the screen, more than 4000 lux is the outdoor screen

What did you think of the result? Those screens were actually renovated rental funds, and the boss asked the seller to refund the full amount based on the test results!

4. Is it harder to choose a model than to find a partner?

Remember this universal formula:​The scenario determines the model!​​

There was a shopping mall that was so evil that I insisted on buying the highest matching, but it didn’t have full brightness for three years. The extra 150,000 yuan was enough to buy a screen!

I want me to tell you, this LED screen model is like a person's ID card—​​No need for it in normal times, but if something happens, I really want to fool you without it.​! Next time you buy a device, you will take your phone and circle around the screen three times, and take a picture of the model and store it in the cloud. Remember:​Manufacturers who dare not set models will have a ghost in their hearts​! Next time, if you encounter a salesperson, you will just say: "Let me explain the position of the model label first!" It is sure that he is so scared that he dare not play tricks!

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