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LED display screens are widely used due to their seamless splicing, energy efficiency, and high-quality visuals. However, they may encounter technical issues over time. Here are the most common LED display problems and their solutions to help you troubleshoot and resolve them efficiently.

  1. Abnormal Display in Certain Areas

✅ Issue: A section of the LED screen is malfunctioning.
🔍 Cause: The LED control card or receiver card may be faulty.
💡 Solution: Identify the problematic receiver card and replace it.

  1. Horizontal Line Issues

✅ Issue: A horizontal line appears across the LED display.
🔍 Cause: Loose cables or damaged LED module connections.
💡 Solution: Check for loose cables, reconnect them, and replace damaged modules or connectors.

  1. LED Screen Flickering or Flashing

✅ Issue: The LED display flashes unexpectedly.
🔍 Cause: Loose power cables or overloaded power supply.
💡 Solution: Secure the power cables properly and replace the power supply if overloaded.


  1. Long Dark Strips or Bright Red Stripes

✅ Issue: LED screen displays long, dark, or bright red strips.
🔍 Cause: Poor soldering or damaged drive IC.
💡 Solution: Use a hot air gun along the affected strip to fix the soldering issue, or replace the faulty drive IC.

  1. LED Display Not Working & Sender Card’s Green Light Flashing

✅ Issue: The LED screen does not turn on, but the sender card’s green light flashes.
🔍 Cause: Network cable issue, power supply problem, or faulty sender card.
💡 Solution:

  • Ensure the network cable is properly connected.
  • Verify the power supply voltage (should be 5-5.2V DC).
  • Replace the sender card if necessary.
  1. LED Display Not Working & Sender Card’s Green Light Not Blinking

✅ Issue: The LED display remains off, and the sender card’s green light does not blink.
🔍 Cause: Faulty HDMI/DVI cable, incorrect display settings, or software issues.
💡 Solution:

  • Check and reconnect the DVI/HDMI cable.
  • Set the graphics control panel to copy or expand mode.
  • Turn on the LED display through the software settings.
  • Replace the sender card if needed.

Why Choose Electrolyte Solutions for LED Display Repair?

  • Fast & Efficient Service – Minimize downtime with our quick response team.
  • Comprehensive LED Repairs – We fix all LED display components with precision.
  • Industry Experts – Serving businesses in broadcasting, retail, sports venues, education, and commercial buildings.
  • Affordable Pricing – Competitive rates for high-quality repairs.
  • 24/7 Technical Support – Get assistance anytime you need it.

Get the Best LED Display Repairs Today!

At Electrolyte Solutions, we prioritize quality, speed, and customer satisfaction. Whether you need emergency LED display repair or routine maintenance, our skilled technicians are ready to assist.