No Display On Monitor but CPU Running?

If you’ve ever come across the no display on monitor but CPU running error, then you are not alone as it is quite the common issue! When this error occurs, you will notice that your monitor might turn on but there is no display. Your screen might be blue or black.

The surprising aspect is that you might see your CPU start-up and heat the fans from it, suggesting that the device is switched on. However, when you try to access the computer via the monitor, it is completely blank.

The main problem is that it can hinder your work and progress so you might want to figure out how to fix it asap!

There is no need to worry, however, as today’s article is dedicated to helping solve the no display on monitor but CPU running error!

Here are the top 5 methods you can opt for:

Make sure your monitor is working

Before you proceed to any of the difficult methods, we recommend that you make sure your monitor is not damaged. If it is working, then you might want to move onto more time-consuming troubleshooting on other components of the device,

You will need to disconnect the monitor from the computer. Once this is done, you can then turn it on again to see if that fixes it. In case your monitor display shows any activity, then at least you know it is also powered on and not dysfunctional.

Did this not work out for you? We recommend you move onto the next fix instead!

Make sure your power supply is not faulty

Another preliminary test to check why your monitor won’t turn on is to make sure the power supply is working. To figure this out, we recommend that you test it. The interesting aspect is that even though your CPU might be working, it can still mean your power supply is faulty.

Your power supply is one of the leading causes as to why there might be potential hardware issues. Therefore, it is one of the best initial tests to do to figure out why the no display on monitor but CPU running error emerges.

If you think this is the culprit, then you can simply replace the power supply!

If this hasn’t worked out great for you either, then you can easily opt for this next option:

Make sure you try reconnecting the monitor

In some cases, it might be a faulty connection between the computer and your monitor that is the root of your problems. You might want to re-establish the connection between the computer and your monitor. In many cases, this might fix your issue entirely.

Here are the steps you need to follow:

  • Your first step will be to press the power button to make sure the computer is switched off.
  • Then, once the computer is switched off, you will detach the cable that connects your monitor to the computer.
  • After this, you can simply confirm that the port connectors connecting your monitor and computer are not faulty.
  • The next important step is to make sure that your video cable is not damaged. In case it is damaged you might need to replace it. However, if it is fine then you will want to re-establish the connection.
  • Finally, you will switch the computer back on so that you see if the issue has been fixed.

Is your attempt to fix the no display on monitor but CPU running error still not successful? Try this next!

Make sure you try to set the BIOS settings to default

Sometimes the real cause behind the no display on monitor but CPU running error can be due to faulty BIOS settings. These settings are responsible for launching your operating system and personal settings. The easiest method to fix this black screen issue is to reset your BIOS to its factory settings.

Use these steps to achieve this:

  • First, turn the computer off by holding down the power button.
  • Next, we recommend that you take out the AC power cord from its power supply. You will then need to open the computer case.
  • Find your motherboard and take out the CMOS battery safely by using a screwdriver.
  • You then need to wait for a few minutes and continue reinstalling the CMOS battery.
  • Finally, you can reconnect the AC power cord and the power supply. Then, you can switch on your computer and easily figure out if this was the cause.

We have one final method for you to fix your issue!

Try disconnecting and reinstalling the peripherals

Often, the issue that leads to the no display on monitor but CPU running error can be the different devices or peripherals that are connected to your computer. The easiest method is to simply disconnect all of the devices and check what the issue is.

Here is what you need to do:

  • First, you will turn your computer off via the power button.
  • Then, you need to make sure the peripherals are disconnected including the scanner, printer, webcam, or mouse.
  • Then you can try and switch the computer on again.

If the device is booted up correctly, then your peripherals might be causing the issues of your screen staying black. The easiest way to fix this is to reinstall the devices back and individually check them to see if the issue reoccurs. In case you find that the issue is caused by one device, either replace it or reinstall its drivers.


In conclusion, this has been our detailed review on how to fix the No display on monitor but CPU running error! Hopefully, the steps and options outlined in this article will aid you in dealing with the issue without any need for professional help.

About the author


I am a Professional Writer who loves to write on Technology. I do brief research on each topic before starting.

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