LED screens are incredible investments you can use for your marketing and advertising needs. In fact, over 63% of the people included in the study claimed their attention was captured by digital signage and LED screens. It’s one of the reasons why they make an incredible tool for advertising or even just simple information dissemination tasks. 

How To Fix LED Screen Issues

Many LED screens, however high quality they may be, can be subjected to issues that need fixing. There are many issues that can happen with your LED display. If you have no idea how to fix LED screen, you will have no choice but to contact a technician or hire an expert to solve the problem for you. 

Here are 10 common issues you will encounter with your aLED display and the probable solution you can do to fix it. 

1. All Black Screen

How to fix black spot on LED screen? How about if your entire display is all black?

An all-black screen is when your entire display is black even after turning it on. Here are the steps you can take in figuring out how to fix LED screen when it’s all black. 

  1. Check if your LED screen is plugged in and switched on
  2. Look at the signal cable and if it’s connected. If not, do it and peek at the indicator to be sure
  3. Evaluate if the sending and receiving cards are in good condition. Peek at the indicator, if it’s blinking fast or has no light at all, it means you will have to replace the card
  4. Use studio software to assess the condition of the DVI card

2. Unsynchronized LED Display

When there’s a disconnect between the LED display and the computer, it’s usually an issue with the connection of the sending and receiving cards or its software card setting. The solution on how to fix LED screen that’s unsynchronized is to either replace the card or restore the settings. Check out if the system has issues first before working on replacing the card to avoid wasting money and time. 

3. Garbled LED Display

Dealing with a garbled LED display will mean that there might be an issue with one or several of the following areas:

  1. Receiving and sending cards – Check the indicator light to know if the card is working normally. If it’s blinking or has no light, it might need replacement. 
  2. Internet cable  – Check if the cable is properly connected so that it doesn’t affect the performance of the LED display.
  3. LED studio setting – Open the LED studio software and check if the setting is in the appropriate configuration. 
  4. Signal cable – Look at the signal cable connection for the possible disconnect that can be responsible for the issue.

4. Overlapped or Distorted LED Display

You should also be able to learn how to fix LED screen that has a distorted or overlapping screen. In this case, here are the troubleshooting steps to take:

  1. Signal cable to cabinets – Assess the condition of your signal cable and check for possible damages. Replug the cable and if still doesn’t work, replace it. 
  2. DVI cable – There’s a possible issue with the connection between sending and multi-media cards. Disconnect everything and reconnect them again to check their condition. If it doesn’t work, you might need to replace it. 
  3. LED studio setting – Open the studio software and check for possible issues in the configuration. Follow the steps in troubleshooting the control system for faster evaluation.
  4. LED sending card – Check out the sending card’s status if they are functioning or if there’s a need to replace it. 

5. Shaking or Winking LED Display

Here are the solutions on how to fix LED screen that seems to be winking or shaking. 

  1. Sending & receiving cards – Make sure that the green light indicator is on and that it’s not flashing. Otherwise, it means that the sending and receiving card may need replacement. 
  2. Ground wiring – Check for a possible break-off in the wiring on the ground.
  3. Signal cable to cabinets – Disconnect the cable and plug it in again. Once it doesn’t work, think about getting a new one.
  4. Studio setting – Look at the setting and configuration on the software if there’s a mistake made. You can reconnect the signal cable first and then reopen the software. To make it easier, just follow the steps on the controlling system. 
  5. DVI cable – Look at the cable that connects the sending and multi-media card and then disconnect and connect it again if there’s an issue. 

6. Loading Overload (Miscommunication Failure)

Working on how to fix LED screen for loading overload or failure will mean checking out all the elements that may have caused the issue, including the following:

  1. LED control system devices – Make sure that all devices are switched on. 
  2. Serial port line – Check for loose or disconnected lines.
  3. Control software and card – Double-check if you’re using the appropriate control card and software, along with the correct settings (data transfer rate and transmission method). 
  4. Jumper cap – See if the cap has come off or has loosened through time. Arrange the jumper cap in a way that the direction is correct. 

Note: If the problem persists, get a multimeter to troubleshoot the control computer’s serial ports. If the ports are not the problem then repair and maintenance may be needed. 

7. Short Circuit

For short circuit problems, here are some of the solutions to how to fix LED screen that are worth taking a look at.

  1. Troubleshoot using a multimeter to check the following elements:
    1. Resistance – Check for the range of resistance and make sure that the value is within a safe range that won’t cause an issue in its operation. 
    2. Voltage – Check if the ground voltage is within a normal value that won’t cause issues to the LED display. Try to check the possibility of a voltage drop but make sure that the screen is turned off before you do. The drop value should be similar to the integrated circuit.
    3. Short circuit – Check for a possible case of a short circuit through the functions of the multimeter. 

8. No Display On One Or Several Panels

There are times when nothing is displayed on one or several LED panels. In this case, how to fix LED screen is to do the following:

  1. Power Supply – Check if the device is plugged in or not, as well as if it’s loose. 
  2. Signal Input – This is the case, especially if there’s an inconsistent color on the LED display. Take out the plug in the cable and put it in again. If that doesn’t work, you might need to replace the flat cable and even assess the PCB board interface if that still doesn’t work out. 

9. LED Screen System Not Found

There are times when the display shows “LED screen system not found”. If you’re experiencing that, the solution to how to fix LED screen with this problem may be one of these:

  1. Connections – Assess all of the connections in the LED screen, including the serial port line, sending card, and USB. You can disconnect them and reconnect them again. 
  2. USB/COM Port – It’s possible that the USB port or COM port is broken and needs replacement. You might also need to replace the serial port line and controller at the same time. 
  3. Sending Card – Check if the sending card is working properly. It might be broken and needs replacement. 
  4. USB Driver – You might have overlooked the need to update the software of the USB driver. Check if it’s updated and install the latest software if necessary. 

10. Color Inconsistency On LED Display

For LED displays with color inconsistencies, the problem may lie in the IC driver pins. When working how to fix LED screen with this problem, focus on the pins. This simply means that the pins that control the row or area where the color is inconsistent and not working properly. Solve this by pinpointing the affected driver IC and either replacing it or repairing it. 


Working on how to fix LED screen may be overwhelming for many but as long as you have a guide to follow, you can troubleshoot your display without expert help. In case you feel like the issue is bigger and more complex than what you can handle, ask a professional to help you solve the problems.

Similar Posts