Human wisdom is infinite, there are only things you can't think of, nothing you can't do. Since the emergence of LEDs, smart users have expanded its different functions, made signs, which can be seen at a glance; stations, display train information; Supermarket, do import and export tips. No matter what it is used for, after using it for a long time, you need to pay attention to the maintenance of the led display. Many people ignore the maintenance method of the led display because of its lighting.

　　 LED display repair method summary

　　 1. LED display repair-unit board does not light up

  the reason

　　 When the LED is powered on, it is found that the unit board does not light up. After inspection, it is found that there is no +5v, and the data line is also broken.

  Solution

　　 If the power supply is broken, it is OK to replace the power supply. If the data cable is damaged, it is OK to buy a matching data cable.

　　 2. LED display repair-the whole screen is not bright

  the reason

　　 After the power is turned on, if the LED does not light up as a whole, it should be that the main controller does not have +5v; it may be that the entire screen has no AC power; it may be that the computer is set up incorrectly.

  Solution

　　 In view of the above problems, check one by one. If the power supply is broken, replace the power supply; if there is no AC power, check the power supply circuit with a universal meter; if there is a problem with the setting, readjust it.

　　 3. LED display repair-a unit is always on

  the reason

　　If this happens, there should be a problem with the data cable connected to this unit, or the corresponding distribution board is faulty. The probability of a certain fast unit board failure is relatively small, but it needs to be checked.

  Solution

　　 First plug in the data cable again, pay attention to the direction, and check the effect. If it doesn’t work, you can try another data cable. If it doesn’t work, replace the distribution board or replace the unit board. It will definitely be resolved.

　　 4. LED display repair-abnormal communication

  the reason

　　 It is very likely that the software setting is incorrect; whether the communication line is connected; MAX323 has a problem.

  Solution

　　You can restart the computer and turn on the display again. In order to check and repair it, you can continue to check the settings. If there is a problem, you can reset it. If it is still not repaired, you need to measure with a digital meter and replace this MAX232.

　　5. LED display repair-the whole screen will light up every few lines in the horizontal direction, and not light up every few lines

  the reason

　　 Basically, the network cable is not plugged in properly, and accidentally touched during use, causing the connector to loosen.

  Solution

　　Re-plug the network cable. This is not as difficult as the above. Check whether the contact point is good. If it is rusty, you can sand it with sandpaper.

　　 6. LED display repair-the large screen displays normally, the computer screen is black

  the reason

　　 is expected to be caused by incorrect computer settings.

  Solution

　　 The computer must be set incorrectly. Set it up again. If not, you can read the manual.

　　 In summary, the editor took real life as a case, first talked about the role of led display, then led to the maintenance of led display, and finally explained the six methods of maintenance of led display. The maintenance method of led display screen is the end of this article. I believe you have read it and have a good idea about the maintenance of led display screen. If you are interested in led display repair,