Hey brother! Did your LED screen suddenly become a big black? Or flash like snowflakes in the old TV? Don't rush to stab yourself with a screwdriver--​Finding the right repair channel can save thousands of dollars than doing it​! Today I will talk to everyone about where to run if something goes wrong with the display screen.

1. Maintenance channels: Don’t just search for "nearby maintenance"

▍Official after-sales service: expensive but life-saving

Two days ago, a guy who opened a bar had three black lines being stepped on by a customer on the stage floor tiles. He found a street shop for cheap, but the more he repaired it, the more he had become more and more expensive. Later, we found our original technical team,​When you scan it with a professional optical detector, you will find that the driver IC is burned​​, change the accessories and resurrect immediately.

​​Why do you recommend looking for an original factory?​​

• Have your product parameter drawings (such as P screen, what type of light beads are used)
• The same batch of materials are stored in the spare parts warehouse (avoid the color difference of the lamp beads that are replaced)
• After the repair, I dare to sign a quality assurance agreement for you (we will provide customers with insurance starting from three months)

▍Professional repairman: Check these 3 hard indicators

If the warranty period is over or if you are in a hurry to repair it on the same day, you can find a third-party repair point. But be sure to keep your eyes open:

1. ​​View the equipment​: Stores that do not even have hot air guns and lighting fixtures, pass directly
2. ​Ask a case​: "Have you repaired a screen of the same model?" (Our technical guy just repaired a water inlet on a fence screen in a Korean stadium last month)
3. ​​Try the craft​: Let the master disassemble a bad module in person (skilled workers can disassemble the box in 5 minutes)

Let me give you a negative textbook: Last year, a shopping mall's high-definition advertising wall flashed screen, and the repair shop said it was a power problem, but it was still the same if it was replaced by three power supplies. Finally, I found that the card receiving program was inconsistent - this problem must be solved by the grayscale correction software we developed.

2. These problems can actually be rescued by yourself

​​Don’t call the master to come at you at any time! Try these tricks first​：

• ​​Black screen but power light on​：
  ① Check if the signal cable is loose (shake the connector twice with your hand)
  ② Press the "Source Switch" key for 3 seconds for the remote control (many screens have been accidentally cut into the signal source)

• ​​Parent color block abnormality​​：
  Use alcohol cotton pads to wipe the gold fingers of the wire (80% of which are poor oxidation contact)

• ​​Full screen jitter​：
  Connect the power cord separately to the socket (don't share the circuit with the air conditioner and freezer)

Our 24-hour technical hotline has received the most amusing case - the customer said that the newly installed transparent window screen was yellow, and the engineer rushed to the night to find that it was the cleaning lady who put an anti-collision film on it! Tear off and immediately restore the 86% transmissivity.

3. The maintenance quotation is very deep! Teach you not to get a knife

​Remember this quote formula​：
Labor fee (300-800 yuan/day) + material fee (calculated based on bad parts) + transportation fee (usually exempt within 50 kilometers)

​Three things to ask for when preventing pits​：

1. "Are you changing to original parts or compatible parts?" (The price of compatible parts is at least one-third)
2. "Can you charge a door-to-door fee if you can't repair it?" (No charge for regular maintenance points inspection)
3. "How long can it last after the repair?" (It is the real technology that dares to protect for three months)

Last month, I encountered a tough guy when I was repairing a fence screen for a gymnasium in Japan - the customer bought a second-hand receiving card himself, but the parameters were mismatched and the control system crashed.​So, saving accessories may cost double the repair fee in the end​。

4. It is better to prevent repair than repair! Daily maintenance guide

​​Teaching you a few tricks to extend the life of the screen​​：

• Use a brush to clean the indoor screen every week (don’t wipe it with a wet rag!)
• Outdoor screens are inspected for sealant strips every quarter (especially in areas with typhoon-prone occurrence)
• When transporting a rental screen, it must be disassembled into a module (the entire screen transportation vibration is likely to damage the line)

The curved advertising screen project we have made for Singapore is strictly followed by the maintenance manual. It has not even had a dead light for three years. On the other hand, some merchants turn on the maximum brightness every day and burn the lamp beads bald in half a year.

Personal opinion: Maintenance should also be about "a match"

I have been working in the display screen for more than ten years and have seen too many people suffer from the difficulty of choosing - I feel that I have lost my mistake when I look for the original factory, and I am cheated when I look for the roadside store for a big problem.​​In fact, it’s like seeing a doctor. Going to a community hospital with a cold or a fever, you have to find a top-level expert in the heart bypass.​。

Recently, I have a deep understanding when I was helping a shopping mall in Seoul to repair transparent window screens: the customer initially thought that our inspection fee was expensive, so he couldn't get it done for two weeks. Finally, after the full set of inspections, it was found that it was a defect in the power module design. Not only did it replace new accessories for free, but it also upgraded the intelligent brightness adjustment function.​​Leave professional things to professionals is the most cost-effective shortcut​。

If you are not sure who you should contact, you can shoot the fault video and send it to the technical team. For example, if we engineers take a look at the flickering frequency, we can guess whether it is a power supply or a signal problem. We must give you a clear idea!

(I'm really in a hurry to use it? Remove the plug and let it sit for ten minutes first. Maybe there will be a miracle - don't ask why, it's just the metaphysics of screen repairers)

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