Snowflakes suddenly appear on your large LED screen? The whole area turned black like it was chewed? Don’t rush to find someone to dismantle it yet! Last month, a mall manager spent an unreasonable amount of money, mistaking a power supply failure that could have been repaired as a module damage, and spent an extra 20,000 yuan. Today we will talk about repairing those doorways to ensure that you will no longer be taken advantage of after reading this.

​​The first step: first find out whether to repair or replace​​
Turn on the flashlight of your mobile phone and hold it close to the screen to take photos of three places:

1. ​​dead light zone​ ​: A single lamp bead does not light up at all (can be replaced individually)
2. ​​color shift area​ ​: The lamp beads are yellowed or discolored (the entire set needs to be replaced)
3. ​​connection area​ ​: Oxidation of the cable interface (recoverable by cleaning)

The case of a convenience store owner is particularly typical - vertical stripes appeared on his poster screen, and the rust remover he sprayed caused corrosion on the circuit board. In fact, this kind of questions use​ ​Wipe the cable interface lightly with alcohol cotton pads​ ​It can be solved without spending a penny.

​​Step 2: When choosing a repair provider, look at these 4 details​​
Don't listen to deception, just ask the other party to show:

• ​​Repair quotation​ ​(Must break down material/labor costs)
• ​​Proof of source of accessories​ ​(Original parts or compatible parts)
• ​​Warranty Agreement​ ​(Guaranteed for at least three months)
• ​​Project case diagram​ ​(Maintenance records of similar types of equipment)

Important reminder: For outdoor screen repairs, you must confirm that the other party has​ ​Aerial work certificate​ ​and​ ​Anti-static equipment​ ​. Last year, a gym hired unlicensed personnel to repair a large screen on the roof. As a result, three modules were broken, and the repair fee rose from 8,000 to 30,000.

​​Step Three: Keep abreast of the latest maintenance trends​​
Industry average price list in 2024 (unit: square meters):

The price difference seems quite big, right? But regular service commercial use​ ​Original chip​ ​The warranty lasts for 2 years, but the disassembled parts used in street shops may break down in three months. Calculating the general ledger: One repair of the stadium fence screen saves 4,000 yuan, but if it is repaired twice every six months, it will cost 5,600 yuan more.

​​Exclusive data:​​
Industry research shows that 72% of secondary repairs are caused by irregular first-time repairs. Especially in the waterproofing process, repairers who cut corners can save money.​ ​Three-layer glue filling process​ ​, the circuit board will be scrapped immediately after heavy rain. Remember, high-quality sealant will have a light citrus smell, while low-quality sealant will have a pungent chemical smell.

Editor's opinion: Next time you see a maintenance worker with a transparent tool box (you can see an anti-static bracelet, heat gun, and oscilloscope), you can basically rest assured. It is recommended to send those tools stuffed in plastic bags directly to customers - 80% of the professionalism can be seen from the equipment.

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