Ouch hey! Why did the LED screen at the entrance of your shopping mall suddenly become black? Don’t rush to find a maintenance team. Today I will teach you some tips for self-tests. I will definitely understand better than Lao Wang next door!

1. Power detection: Don’t blame the screen for now, it may be that the plug is lazy

The LED sign at the hot pot restaurant downstairs in our house was blacked last month, and the boss was so angry that he jumped. Guess what happened? ​ ​The plug is loose​ ​! I feel outrageous when I say this.

• ​​Three steps for self-test​​：
  → Touch the power adapter to be hot or not (quit power off quickly after exceeding 60℃)
  → The voltage measurement is stable or unstable (the voltage regulator must be replaced if the fluctuation exceeds 10%)
  → Check if the power cord is gnawed by mice (don't laugh! It happened at the exhibition center last year)
• ​​Data talk​ ​: Industry statistics show that 35% of the so-called "screen failures" are actually power problems

2. Signal transmission: The screen stuttering is not necessarily the case of the screen

Two days ago, I helped my friend check the LED wall in his bar, and the picture always skips frames. It turns out that​ ​The HDMI cable is soaked in air conditioner condensation water​ ​Who would have thought of this?

• ​​Key points for troubleshooting​​：
  → Restart the signal source device (computer/player) to try
  → Test for changing wire (don’t worry about that 180 yuan)
  → Check the signal amplifier temperature (continuous high temperature will burn the chip)
• ​​Practical skills​ ​: Use your mobile phone to take a screen. If the photo shows black ripple, it is probably signal interference

3. Pixel failure: Is it important to have a small black dot?

The most exaggerated case I have ever seen is that there are 20 dead spots on the large screen of the gymnasium, and the maintenance team will pay 80,000 yuan. actually​ ​A single dead point does not affect usage​ ​, don't be fooled!

• ​​Determination criteria​​：
  → ≤3 dead points within 1 square meter belong to the normal range
  → Repair is required if 5 pixels fail in succession
  → Colored stripes are usually a problem with the wiring (if you can fix them, don't change them)
• ​​Tips for saving money​ ​: Use solid color test pictures (red/green/blue/white) to quickly locate problem areas

4. The cooling system: It is no small matter if the screen is hot

Last month, the LED curtain wall of an office building was smoked, which scared the entire building to evacuate. Check it out​ ​The cooling fan accumulates dust​ ​, it will be fine after cleaning.

• ​​Maintenance secrets​​：
  → Clean the dustproof net every quarter (more accumulation exceeds 2 mm to affect heat dissipation)
  → Listen to the abnormal noise of the fan (precursor of bearing wear)
  → Touch the heat sink temperature (the indoor screen should not exceed 50℃)
• ​​Lessons of blood and tears​ ​: Long-term high temperature work will shorten the life of the lamp beads by 70%.

5. Software system: The black screen may be because the program is making trouble

My buddy's gym, the LED screen will be blacked out for 30 seconds every time it reaches the hour. Finally found out​ ​Timed switch program conflict​ ​, how unfair you said!

• ​​Self-rescue plan​​：
  → Restore factory settings (remember to back up the content first)
  → Check the firmware version (it must be upgraded if it is more than 3 versions behind)
  → Look at the control card indicator (always on = normal, flashing = faulty)
• ​​Cold knowledge​ ​: 90% of the screen-flowing phenomenon can be solved by restarting the control system

If I want to say, many LED screen problems are not quality issues at all. Some manufacturers want you to return to repair every few days so that they can make money on accessories. Remember, next time there is a problem with the screen, follow these five steps first, so that the repair provider will not dare to make a random price!

for more product information and pricing, please contact us .