How to solve the common faults on the LED screen?

1. What is the reason for the failure to load or communication?

The reasons for the lack of communication and the failure to load are probably the same, which may be caused by the following reasons, please compare with the listed items and operations:

1. Make sure that the control system hardware is properly powered on. (+ 5V)

2. Check and confirm that the serial cable used to connect to the controller is a straight-through cable, not a crossover cable.

3. Check and confirm that the serial cable is intact and that there is no looseness or shedding at both ends.

4. Choose the correct product model, correct transmission method, correct serial port number, correct serial transmission rate, and set the control correctly according to the DIP switch diagram provided in the software, according to the LED screen control software and the control card selected The address bit and serial transmission rate on the system hardware.

5. Check whether the jumper cap is loose or falling off; if the jumper cap is not loose, please make sure that the jumper cap is in the correct direction.

6. If it still fails to load after the above checks and corrections, please use a multimeter to measure whether the serial port of the connected computer or control system hardware is damaged to confirm whether it should be returned to the computer manufacturer or the control system Body return test.

2. Why does the bright line appear on the LED screen for a few seconds or the screen picture changes when the LED screen is powered on?

After connecting the screen controller to the computer, the HUB distribution board and the screen properly, you need to provide + 5V power to the controller to make it work properly (in this case, do not directly connect to 220V voltage). At the moment of power-on, a bright line or "flower screen" will appear on the screen for a few seconds. This bright line or "flower screen" is a normal test phenomenon, reminding the user that the screen will start to work normally. Within 2 seconds, this phenomenon is automatically eliminated and the screen enters the normal working state.

3. What does automatic or manual brightness adjustment mean?

Brightness adjustment refers to the adjustment made between the darkest and brightest that can be displayed on the screen, not the light adjustment. Automatic brightness adjustment is based on the different brightness that should appear in different time periods and automatically adjusted to a predetermined brightness by the wide LED screen control system. Manual brightness adjustment refers to the end user through the operation of the LED screen control system to make the LED screen reach a specified brightness.

4. The reason why the whole screen of the unit board is not bright or dark

1. Visually check whether the power cable, the 26P cable between the unit boards and the power module indicator are normal.

2. Use a multimeter to measure whether the unit board has normal voltage, and then measure whether the voltage output of the power module is normal. If not, it is judged that the power module is bad.

3. Measure the low voltage of the power supply module, and adjust the fine adjustment (fine adjustment of the power supply module near the indicator) to make the voltage reach the standard.

5. What is the reason why the LED screen is completely black?

In the process of using the control system, we occasionally encounter the phenomenon that the LED screen is completely black. The same phenomenon may be caused by a variety of reasons, and even the process of turning the screen black may vary with different operations or different environments. For example, it may be black at the moment of power on, it may be black during loading, or it may be black after sending, etc .:

1. Make sure that all hardware including the control system has been properly powered on. (+ 5V, don't connect the wrong or wrong)

2. Check and repeatedly confirm whether the serial cable used to connect to the controller is loose or falling off. (If it becomes black during the loading process, it may be due to this reason, that is, the communication line is interrupted due to the loosening of the communication line during the communication, so the screen becomes black. Please check it by yourself, it is very important to solve the problem quickly.)

3. Check and confirm that the LED screen and the HUB distribution board connected to the main control card are tightly connected and inserted correctly.

If you want to know more, our website has product specifications for LED screen, you can go to ALLICDATA ELECTRONICS LIMITED to get more information