Boss Li, who has just entered the industry, has been very worried recently - the outdoor advertising screen I bought for 200,000 yuan, had a color block that fell off after half a year of use. Anyone who wants to put this matter on his body has to pat his thigh! Today I will talk about the tricks of buying LED advertising screens.

1. Online price comparison vs offline inspection, which one is more reliable?

Last month, the purchasing manager of a supermarket chain complained to me:​​P4 outdoor screen with the same parameters, the price difference between the three companies is BMW 3 Series​​. This is not uncommon, the key is to look at the trick:

• ​​E-commerce platform​​: Suitable for small-size basic models, but be careful of "parameter fraud" (a hot-selling model on a certain platform is nominally IP65 waterproof, and it is short-circuited when it is rainy)
• ​​Factory direct store​​: It is recommended to choose the physical exhibition halls of the Pearl River Delta Industrial Belt first. The density of LED factories in Bao'an in Shenzhen is comparable to that of Shaxian snacks.
• ​​System Integrator​​: Suitable for customers who need "screen + content + operation and maintenance", but the commission of middlemen is generally 15%-25%

There is a cold knowledge: if a truly capable manufacturer, there must be an aging test area in the exhibition hall. The real skill is to use a flashlight to shine the seams of the box and be able to see three layers of anti-rust coating.

2. Five hard indicators lock the screen

1. ​​Don't get tricked in brightness​​
   If the outdoor screen is less than 4000cd/m², it’s a hooligan! But the brighter the better. The 7500cd/m² screen on a commercial street was fined 50,000 yuan at night when it was complained of light pollution.

2. ​​Refresh rate hidden secret​​
   1920Hz is the watershed in the industry, and videos below this number are all ripple. Let me teach you how to detect earthwork: turn on the phone camera and face the screen, and you can see the scanning line directly pass.

3. ​​Waterproofing is not about numbers​​
   There are also tricks in IP65 certification! The outdoor screen that truly stands the test must have a silicone seal + drainage hole design at the joints. Take a bottle of mineral water and pour it on it at 45 degrees. The water droplets must roll down like lotus leaves and dewdrops to be considered qualified.

4. ​​The secret of power consumption​​
   Don’t believe in the “energy saving 50%” of the promotional page, it depends on the common driving plan. The same 10㎡ P4 screen, the total plan for the monthly electricity bill can save a cleaning lady’s salary.

5. ​​More after-sales team than sales​​
   Manufacturers who dare to promise 24-hour responses have at least 20 engineers rotated in the technical center. The focus is on whether there are overseas service points. Mature markets such as Japan, South Korea, Southeast Asia are touchstones.

3. Three major routines behind the price fog

Recently, I found a tricky operation for my friend:​​Use indoor screen to change outdoor style​​! This type of screen box has a thickness of 2mm, a slight reduction of 30% for the cooling hole, and a quotation of 30% cheaper, but it can only be used for half a year. Teach you three tricks to break the situation:

• ​​Check the brand of lamp beads​​: If you only write "imported chips" and do not specify models, 80% of them are refurbished products
• ​​Touch the heat sink temperature​​: After working for 2 hours, if the heat sink exceeds 60℃, run away quickly
• ​​Copy of customs declaration form​​: Screens exported to Japan and South Korea must be equipped with CE and CCC certification, and these certificates cannot be fake.

There is a real case: a scenic spot bought a low-priced screen with a cheap price, and three years of maintenance fee is enough to buy two new sets of equipment. On the other hand, customers who choose regular manufacturers can save 46% of their five-year operation and maintenance costs, which is a lesson learned from blood and tears.

4. Exclusive pit prevention secrets

• ​​This sentence should be added to the contract​​
  "Free replacement of faulty modules during the warranty period, including manual and travel expenses" - If you miss the second half, you can charge you two thousand door-to-door fees if you change a lamp bead

• ​​Three things to do in acceptance​​

  1. Continuous white screen oven 72 hours
  2. Play high-speed motion video to detect drag and shadow
  3. Test the minimum brightness at 2 a.m. (If it is less than 800cd/m², you can't pass the urban management approval)

• ​​Be alert to deposit routines​​
  Some manufacturers require the 10% final payment as a "quality deposit", but in fact, they will deduct money on the grounds of "human damage" in the second year. It is best to talk about the adult payment maintenance package and transfer the risks to the manufacturer.

Industry veterans say heartfelt

Buying LED advertising screens is not a one-time transaction, it depends on the comprehensive cost of five years. Why do those large factories with monthly output of 10,000 square meters dare to sign a ten-year warranty? Because the box is made of aviation aluminum, the circuit board is treated with three-defense treatment, and these hidden costs are the hard power. Next time you are inspecting, remember to use a vernier caliper to measure the thickness of the box - less than 12mm, turn around and walk and don’t look back!

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