LED display flicker is an all-too-familiar but infuriating condition that can affect visual performance, disturb communication, and erode the integrity of a display system. Regardless of whether flicker appears continuously, on an intermittent schedule, or related to particular patterns on the screen, knowledge of the root cause is necessary for successful troubleshooting and long-term reliability.

The main reasons for the flickering of LED display screens are as follows:
1. The driver loader is incorrect.
2. The network cable between the computer and the screen is too long, resulting in a poor signal. Or there could be network cable faults, such as poor contact of the network cable crystal head, etc.
3. If the sending card or control card is broken, check if the small light on the control card is on. If it is not, it is broken.
4. Check whether the connection line between the power supply and the control card is short-circuited.
5. The output voltage and current of the power supply are unstable. The power supply with control card has too many unit boards.

Solutions and methods for LED display screen flickering:
If the entire screen is dotted with dots or the image flickers, it is usually because the driver loader is incorrect. Recheck the driver loader. If it still doesn't work, uninstall and reinstall it.
Another possibility is that the sending card is broken. In this case, the sending card needs to be replaced.
If it is an irregular flicker, it is usually a problem with the system frequency. Replacing the system or adjusting the setting parameters can basically solve the problem!
If the flickering state is like a few dots, it might be a problem with the graphics card driver or the resolution setting of the sending card.
Another possibility is the power supply issue (insufficient power supply, information noise, electromagnetic interference). When designing a PCB, more consideration should be given to the wire diameters of power and signal traces, as well as the PCB production process. Adding a few more capacitors to the module also brings about some improvements. If accompanied by text flickering (with irregular white edges around the text, irregular flickering, and disappearing after the text disappears), this is a graphics card setting issue. Unsetting the "Show Shadows under the Menu" and "Smooth Edge Transition Effect" Settings in the display properties can solve this problem.

Broadly speaking, good troubleshooting is all about methodical method — checking drivers, signal routes, hardware condition, and software parameters. Through their serial examination, potential causes can be ruled out and LED display flicker can be ruled out such that the screen regains its normal view capability.