1. These symptoms must be repaired immediately

See the screen appears​ ​Snowflake pattern​ ​or​ ​Color block fault​ ​Never drag - this may be an early signal of a control card failure. More serious cases include:

1. ​​Partial black screen​ ​: More than 3 lamp beads do not light up, and must be dealt with within 48 hours (the risk of leakage increases by 70%)
2. ​​Strobe and glaring​ ​: When the refresh rate is lower than 1920Hz, visual fatigue will occur after watching for 30 minutes.
3. ​​Box deformation​ ​: Splicing gap >2mm will cause rainwater to penetrate, and a short circuit will be required within 7 days

Last year, a shopping mall suffered a loss - it was thought that a small black screen would not affect its use, but half a month later, the entire screen burned down, and the maintenance cost soared from 3,000 yuan to 80,000 yuan!

2. Comparison of the advantages and disadvantages of the four major maintenance channels

Key reminder: Choose​ ​Have ISO9001 certification​ ​The service provider has a repair yield of 83% higher than that of ordinary stores

3. Hidden traps of repair quotations

​​Case reappears​ ​: A company repairs the P3 indoor screen, and the quotation says:

• Replace the power module × 2 (actually only need to change 1)
• False report a fault in the receiving card (actually the cable is loose)
• Refurbished lamp beads are not specified (the lifespan is only 30% of the new product)

Three tricks to avoid pits:

1. Requires on-site disassembly inspection (full video recording)
2. Check the serial number of replacement parts (can be checked by original manufacturer)
3. Sign an attenuation compensation agreement (3 months of light fading after maintenance > 5% free rework)

4. In-depth answer to core issues

​​Q: Why does it cost 500 yuan to change the lamp bead? ​ ​
A: Regular maintenance includes:

• Spectrometer calibration (ensure color temperature consistency)
• Removal of sealant (IP protection level restored)
• 72-hour aging test (tampered with implicit faults)

​​Q: Can outdoor screen repair be done on rainy days? ​ ​
A: Absolutely forbidden! Repair when humidity is >80%:

1. 5 times faster oxidation speed of circuit board
2. Glue curing degree decreases by 60%
3. LED chip breakdown risk increases

5. Three tests that must be done after maintenance

1. ​​Brightness uniformity test​ ​: Use illuminance measurement to measure the nine-grid area, the difference is >15% and rework is required
2. ​​Signal pressure test​ ​: Play 4K gradient video continuously for 6 hours to observe whether there is any lag
3. ​​Waterproof re-inspection​ ​: 3 minutes/m² water flow irrigation

With reference for maintenance warranty standards:

• Basic maintenance warranty for 3 months
• Replace core components for 1 year
• Full screen renovation for 2 years

To be honest, finding a repairman is like finding a doctor - it would rather spend more money to find a "grand-level hospital" than to find a "risk doctor" for cheap. Those who dare to show you the engineer qualification certificate, can provide pre- and post-maintenance inspection reports, and are willing to sign a long-term warranty agreement are the real and reliable ones. Before the next repair, remember to ask clearly what glue you use (recommended Dow Corning 795 silicone) to ensure that you can get 80% less pitfalls!

for more product information and pricing, please contact us .