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How to solve the fault of LED display screen?

2021-11-02 1,203

How to solve the fault of LED display screen? There are many reasons why the full-color LED display screen can not display normally. Here is a summary of how to solve this problem. If the new screen is powered on, it may be that the control card is not set correctly or there is no cable (check the cable from the control card to the first chip), and this problem will also occur if the 5V power supply is connected incorrectly.

If this phenomenon is suddenly found after a period of time, in addition to the failure of the control card, the biggest possibility is that the board water burns the chip or power supply. You can also try to connect a DVI interface display to see if the DVI output signal of the graphics card is normal.

The DVI interface resolution of the ordinary card is 1024 * 768. The cause of LED display screen may also be the problem of graphics card or driver. Try to unplug the network cable on the rear terminal block of the display, press the debugging button on the receiving card to see if the screen scanning is normal.

In addition, other reasons for the display of LED full-color display screen are also provided for your reference:

  1. Solution to the problem that the LED display screen cannot display: check whether the power supply of the electronic display screen is normal and whether 220V strong current is input.
  2. Abnormal display of LED electronic display and solutions:
  •  Whether the parameter setting of LED control card is correct and whether it has been transmitted to the LED control card of electronic display screen;
  •  Whether the communication line is normal, and pay attention to whether the LED control card has input signal;
  •  Whether the power supply of 5V LED control card is normal;
  1. Some screens of the electronic screen are abnormal, such as black screen and flower screen. Countermeasures: check whether the abnormal screen power supply works normally; Signal line fault; Single element failure of the screen. A. There is a problem with the output.
  • Check whether the circuit between the output interface and the signal output IC is connected or short-circuited.
  • Check whether the clock locking signal of the output port is normal.
  • Check whether the cascade output data port between the previous drive IC is connected to the data port of the output interface or short-circuited.
  • Poor heat dissipation of the box causes the temperature of the graphics card to rise. Countermeasure: eliminate heat dissipation. Check whether the fan operates normally, refuel the fan, remove the dust in the box, and eliminate the fault after troubleshooting.
  • Reinstall the system. The graphics card or display does not support high resolution.

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