Common Faults & Troubleshooting Methods of LED Displays

Common Faults & Troubleshooting Methods of LED Displays

1.Entire screen fails to light up

1. Check the main power switch and distribution box circuit breaker; inspect power cables for looseness or breakage.
2. Confirm the sending card and computer are powered on, replug both ends of video signal cables.
3. Test with a new power adapter if the original one is broken.

2. Partial black or garbled modules

1. Reconnect flat cables and power wires of faulty modules.
2. Replace flat cables; damaged cables cause signal loss.
3. Swap out the switching power supply if output voltage is abnormal.

3. Uneven brightness & dark patches

1. Inspect loose power connections leading to insufficient power supply.
2. Perform uniform brightness calibration via control software.
3. Replace aged modules with heavily decayed LEDs.

4. Split & misplaced display image

1. Reset load partition parameters of receiving cards in control software.
2. Check network cables and gigabit transmission lines, re-crimp loose crystal heads.
3. Align cabinet splicing sequence with software layout settings.

5. Flickering and random pixels on outdoor screens after rain

1. Cut off power immediately; do not power on to avoid short-circuit burnout.
2. Open cabinet back covers for ventilation and wipe off water on modules.
3. Replace aging waterproof rubber strips and reapply sealant.
4. Power on after full drying; replace damaged modules directly.
   
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6. Dead single pixels

1. If only a few dead pixels exist, the screen can keep normal operation.
2. Replace the whole module if dead dots are numerous; send back to factory for LED repair for minor dead pixels.