Why Does My Monitor Say No Signal

Nothing is more aggravating than having your computer power on but not show anything on the screen. You’re thrown off your game and stressed to the breaking point.

I was on the edge of a breakdown when I first encountered this problem; would I have to pay for a new one? What’s worse, is the hardware I spent my hard-earned money on faulty?

However, if your monitor says there is no signal, it does not necessarily mean that your monitor or hardware is defective. A loose cable could be all that is needed to cause a problem.

We’ll take you step-by-step through the troubleshooting procedure here. Additionally, we’ll talk about the most popular remedies.

Why Is My Monitor Saying No Signal?

The no signal error appears when your monitor is on but isn’t detecting a signal from the connected device. 

Several things can cause this issue, some more severe (and costly) than others. These include:

  • Loose or faulty cables
  • Poorly configured display
  • Outdated drivers
  • Faulty monitor
  • Hardware issue

Troubleshooting Why Is Your Monitor Saying No Signal

In this section, we will discuss how to troubleshoot your monitor in an efficient manner. We will begin with the answers that are the least complicated and work our way up to the ones that are the most difficult.

Full disclosure: things do get a little more complicated if your device is the one causing the problem with the lack of signal. We ask that you not skip any of the stages. It is possible that the issue is with the software, such as an out-of-date driver, or it could be an issue with the hardware. Before drawing any conclusions, you need to make sure that you have tried all of the possible troubleshooting solutions.


Check Your Cables 

Before you try anything else, start by examining your monitor cables closely. A faulty, loose, or wrongly-placed cable is one of the most common reasons for a monitor saying no signal.

Here’s how to properly check your DVI, HDMI or DisplayPort cables:

  • Unplug each cable and then replug them. Ensure each one is properly connected (fully pushed in). 
  • It sounds obvious, but you should also make sure each cable is in the right place.
  • Next, inspect for cable damage. Look for fraying, bends and nicks. Since some issues can’t be seen easily, it’s also a good idea to rub your finger along each cable. This will allow you to feel for less obvious issues. 
  • Examine the cable ports. Dust and debris can clog up the ports and interfere with the connection.
  • Now, test each cable on a different monitor. If you don’t own a spare monitor, we recommend asking a friend if you can use theirs. 
  • If a cable doesn’t work with the new monitor, it’s likely the root cause behind the no signal issue. You will need to buy a new cable.

If all your cables seem to be in working order, move onto the next possible solution. 

Check Monitor Input Source 

In today’s market where versatility is a must, many monitors have multiple input sources. If, for whatever reason, your monitor is set to the wrong input source, you’ll no doubt experience any signal issue. 

You can check (and change) the monitor’s input source by accessing the display menu settings.

  • Simply open up the display menu, and look for the “input source” setting. Some monitors also have an actual button on the side. This button allows you to cycle through the various options.
  • Set your monitor to the appropriate input source. For example, if your device to monitor connection is through an HDMI cable, you would set the input source as HDMI. 

Examine Adapters


If you are utilizing an adapter, it is important that you check this component as well. Sometimes the display adapter will not work properly, which will cause the connection to be disrupted. Additionally, the type of adapter itself may be the source of the issue. It’s possible that your adapter is to blame for the lack of signal because it doesn’t support multiple displays or the resolution that your monitor is set to. Lower discussion of the resolution configuration can be found further down this page.

Reset the Monitor


It may be necessary to reset the monitor in order to get things back up and running properly at times. The method of resetting is typically straightforward, although it may be different depending on the manufacturer of your monitor. You can look for answers on their help page, or you can consult the monitor’s user guide.


Test With Different Device or Monitor

Cables are all in working order, and your monitor is set to the appropriate input? Then the likelihood is that there’s either an issue with the monitor itself or your device. 

You can use another monitor to determine which one is causing the problem:

  1. Swap out your monitor for a different one, and connect your device to it. 
  2. If the new monitor works fine, it means your monitor is likely faulty. You will need to get it checked over and repaired by the manufacturer.

    Depending on the fault, it might be more cost-effective to invest in an entirely new monitor. 
  3. work and others to not. For this reason, we recommend connecting your monitor up to a different PC as well, just to make sure.

Check Resolution Configuration


Checking the resolution configuration first might save you from having to open up your computer and look for the problem. If the resolution on your graphic card is set higher than what your monitor is capable of displaying, you will almost certainly experience problems with the signal on your screen.

You can try booting up in safe mode in order to modify the resolution to what one of your monitors is capable of handling. Your computer will boot up with a lower resolution than normal by default. The display settings can then be customized according to your preferences using the method detailed below:

  • Open up your Windows settings menu.
  • Go to “system,” then display,” then look for “display resolution.”
  • Change to desired resolution.
  • A pop up will appear asking if you wish to keep these display settings.
  • Select “Keep changes.”

Check PC’s Hardware 


If the solutions described above have not been successful for you, you will need to access the internal components of your computer and examine them. Even a single component that is missing or not functioning properly can cause disaster.

Make sure that your computer is off and then switch it back on before you start troubleshooting the hardware. In addition to that, you need to unhook all of the cords (including the power cord).

First, check for any components that are loose. After opening the container, inspect inside for anything that might be out of place. There is a possibility that a component will look out of place or be positioned at a somewhat uncomfortable angle. However, the majority of the loose parts won’t be readily apparent. It is likely that you will need to feel around each component or reattach it.

Open the case of the computer and look for any components that are loose.

The process of locating a defective component, on the other hand, can be more difficult than looking for a missing or loose component. You will need to replace each of them individually in order to identify which one is broken.

We strongly suggest beginning with the graphics card because, if it’s damaged or loose in any way, this component is the one most likely to be the source of the “no signal” problem. The ram sticks in your computer are another component that should be checked, as problems with the monitor’s display can be caused by a damaged, filthy, or oxidized ram stick. After that, examine the other components of the hardware, including the motherboard and power supply unit.

Reset the CMOS


You can also try resetting your computer’s CMOS: 

  • Turn off your PC and unplug all cables.
  • Open up the case and locate the CMOS battery.
  • Gently remove it from the motherboard – you shouldn’t need to apply much pressure to do so.
  • After 1 to 5 minutes, put the CMOS back into place.

It is important to keep in mind that the procedure described above may look different on your device. Therefore, make sure you read the comprehensive guide on how to replace the CMOS battery.

Can Outdated Drivers Be Why My Monitor Is Saying No Signal?


It is absolutely necessary that you get the most recent drivers. Your personal computer may experience a variety of issues if its drivers are out of date. They are capable of causing issues such as stuttering, ghosting, and yes, you got it, even a “no signal” message on the monitor.

If you are unable to see anything on your display, updating your drivers may be difficult. However, you can try starting your computer in safe mode, which was covered earlier in this section. If the “no signal” problem only occurs rarely or if your display appears on a monitor that is not the one you are using, you can update the drivers by following these steps:

  • Click on the Window start button.
  • Search for “device manager,” then click this option when it pops up. 
  • Go through the categories, and look for the drivers you would like to update.
  • Right-click the drivers you want to update. Right-clicking will bring up an “update driver” button. 

Related Questions

Can Power Supply Cause No Signal to Monitor?

If there is insufficient power to support the GPU, the GPU might stop the connection to your monitor, resulting in a “no signal” issue. An unstable or poor power supply can also lead to inconsistent monitor display rendering, especially if you have a multi-monitor setup. 

Why Is My Second Monitor Getting No Signal?

There are a few possible explanations for why the signal on your second monitor isn’t coming through. All of the potential causes that we’ve gone over so far in this post could be at play, but the most typical ones are using the incorrect input, not having enough power, or having Windows fail to recognize the second monitor.

Using the suggestions that were presented earlier, you should attempt to troubleshoot your second monitor. In the event that this does not work, you will need to begin addressing issues involving several monitors.


Why Won’t My Monitor Recognize HDMI? 

If your monitor doesn’t recognize an HDMI connection, it’s likely because it’s set to the wrong output. The HDMI port or cable might also be damaged.

Why Does My Monitor Say No Signal When I Play a Game?

If you are playing a game and your monitor displays “no signal,” it is possible that your drivers are out of date, that there is a problem with the GPU, or that your power supply unit is unable to give sufficient power under the intense demand. It’s also possible that your computer is overheating, which is especially likely if you’re playing a taxing game in an environment without sufficient ventilation. An issue known as “no signal” is one of the many performance difficulties that can be brought on by overheating.

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