PC Monitor No Signal Detected HDMI [Solved!]

I can still remember the feeling of panic when I realized my PC monitor was not displaying any images.

After a few minutes of troubleshooting, I discovered that there was no signal detected from my HDMI port.

It felt like an eternity as I tried to figure out the cause and solve it before my work deadline.

In this article, I will share what I learned about why this happens and how you can prevent it in the future.

PC Monitor No Signal Detected HDMI [Solved!]

PC Monitor No Signal Detected HDMI

The most common causes of a PC monitor not detecting HDMI and displaying no signal are an incorrect input port, defective display port, enable HDMI connection cabling, power problems, a faulty video cable, incorrect monitor resolution settings, graphics card issues, an outdated graphics card driver, and a weak power supply.

How to fix a PC monitor where no signal detects HDMI?

If your PC monitor shows no signal and not detected HDMI there are multiple solutions to fix this problem.

The source of the issue can typically be identified by diagnosing each of these elements in order.

First, check the cables and power connections to ensure they are secure. 

Then check the resolution settings on both the monitor and the graphics card. If needed, update the graphics card drivers to their latest version.

Finally, if all else fails consider replacing your power supply or video cable depending on their condition.

Here is a step-by-step process to fix this issue:

  1. Incorrect Input Port
  2. Defective Display Port
  3. Enable HDMI Connection
  4. Cabling and Power Problems
  5. Check the Condition of your Video Cable
  6. Monitor Resolution Settings
  7. Graphics Card Issues
  8. Update Your Graphics Card Drivers
  9. Weak Power Supply
PC Monitor No Signal Detected HDMI [Solved!]

1- Incorrect Input Source

An incorrect input port is a common problem when connecting a PC monitor via HDMI.

This can happen when the source device is connected to the wrong kind of port, such as using an HDMI-to-VGA port adapter to connect a VGA monitor instead of an HDMI one. 

This is because the signal coming from the incorrect port doesn’t match its expected voltage range, so it cannot be interpreted by the monitor.

To prevent this issue from occurring, it is important to check that both devices are compatible before attempting to connect them.

To do this, you should look at the specifications of each device and make sure they have ports that are compatible with each other.

2- Defective Display Port

When a PC monitor is not receiving any signal via HDMI, the problem could be due to a defective display port.

A display port connects the computer to a monitor or other display device. It is responsible for sending video signals from your computer to the monitor.

If this port has become faulty or damaged, then no signal from your computer would be received by the monitor and no image will be displayed on the screen.

The main causes of a defective display port include physical damage such as wear and tear over time, dust accumulation within the port, electrical surges, or software issues such as driver errors.

In some cases, replacing the entire display may be necessary if physical components have been compromised.

If needed they can replace your current unit with another compatible one that will work correctly so that you can continue using your computer without disruption.

3- Enable HDMI Connection

Enabling an HDMI connection is the process of connecting your PC monitor to a device or another output port using an HDMI cable.

HDMI stands for High Definition Multimedia Interface and is the most commonly used type of cord today.

An HDMI cable carries digital audio and video signals between two devices, allowing you to view content on a larger screen such as a PC monitor.

When enabling an HDMI connection, make sure that the cable is connected to both your PC monitor and the device you’re trying to connect with.

Once connected, turn on the device you’re trying to connect with first before turning on your PC monitor.

This way, your PC monitor will detect the signal from the device you’re trying to connect with through the HDMI cable.

If your PC monitor still isn’t detecting any signal after doing this, it is best to connect it to a different port and then turn both devices off and back on again.

4- Cabling and Power Problems

Cabling and Power Problems are common issues when it comes to PC monitors not detecting HDMI signals.

This can be caused by several factors, such as damaged or loose cables, faulty power sources, or compatibility issues between the monitor’s port and the cable being used. 

To identify the problem, users should check their cables for any signs of damage and ensure that they are securely connected to both the monitor and the device sending the signal.

Additionally, they should make sure that the power supply is providing an adequate output current and that it’s properly secured to prevent any disruptions during use. 

Moreover, users should examine which version of HDMI is supported by their devices before attempting to use an incompatible cable.

5- Check the Condition of your Video Cable

When attempting to troubleshoot an issue with your PC monitor where no signal is detected via HDMI, it is important to check the condition of your HDMI cable.

Start by examining the cable for any damage such as cuts, tears, or other visible signs of wear and tear.

If the cable appears to be in good condition, then unplug it from the source device and plug it back in firmly.

Make sure that both ends click into place and that the connection is secure.

Once this has been done, inspect both ends of the cable for any bent or broken pins which may affect performance.

If you find any bent pins, use a pair of needle nose pliers to gently bend them back into their original positions.

6- Monitor Resolution Settings

Monitor Resolution Settings refer to the number of pixels displayed on a computer monitor.

The resolution is typically expressed as a width and height followed by the number of pixels that make up the image.

Higher resolutions result in sharper images and better detail but require more GPU power and memory to display properly.

Many modern monitors support multiple resolutions, allowing users to adjust their settings based on their needs.

Depending on the model, users may be able to adjust the brightness, contrast, sharpness, gamma levels, and response time of their monitors as well.

To ensure optimal results it is important to use the correct resolution settings for each monitor.

7- Graphics Card Issues

Graphics card issues can be a major cause of PC monitor no signal detected HDMI problems.

When the graphics card is not functioning properly, it can prevent the system from recognizing and connecting to a monitor.

This can occur due to a variety of reasons such as the age of the graphics card, incompatible drivers, incorrect settings, or faulty hardware.

Common symptoms include screen flickering, poor resolution quality, or frequent crashes when attempting to connect to a monitor.

To troubleshoot this problem, first, check that all connections are secure and confirmed working correctly.

Also, make sure that any necessary drivers are updated and compatible with your PC’s operating system.

If these steps fail, you may need to replace the graphics card entirely with a newer model that is compatible with your computer system.

8- Update Your Graphics Card Drivers

Updating your graphics card drivers is essential in ensuring that your PC monitor is able to receive and display a signal from an HDMI connection.

Out-of-date or corrupted drivers can cause communication errors between the monitor and HDMI port, resulting in no signal detected.

To update your graphics card driver, you typically need to download the latest version of the driver.

You can download it from the manufacturer’s website.

Install it on your computer using either a manual installation process or an automated driver software program.

Manual installations involve downloading any available updates for the graphics card driver and then installing them on your computer according to the instructions.

This helps prevent no signal detected issues caused by outdated or incompatible drivers.

9- Weak Power Supply

A weak power supply is a major cause of the PC monitor not detecting a signal.

This can happen when the power supply does not provide enough wattage to power both the connected devices and the monitor.

As a result, the monitor may simply shut off, or it may appear to be on but not display any image.

Another common symptom is that the screen will flicker briefly, as if it is trying to activate but quickly loses power.

You must also check for any loose connections between the video cable and your graphics card or motherboard.

To fix this issue, you need to upgrade your power supply unit (PSU) so that it meets or exceeds the minimum requirements of your components and monitor.


In conclusion, if your PC monitor not detected HDMI and shows no signal, you can troubleshoot the monitor by following these steps:

  1. Incorrect Input Port
  2. Defective Display Port
  3. Enable HDMI Connection
  4. Cabling and Power Problems
  5. Check the Condition of your Video Cable
  6. Monitor Resolution Settings
  7. Graphics Card Issues
  8. Update Your Graphics Card Drivers
  9. Weak Power Supply

If your PC monitor is still not detecting HDMI and shows no signal after trying all these steps, the problem is likely with the monitor itself and should be sent in for repair or replacement if it is still under warranty.


Can Power Supply Cause No Signal to Monitor?

Yes, a power supply can cause a computer monitor to not receive a signal.

If the power supply isn’t providing adequate wattage to power all of the components of your system, then it can result in insufficient power reaching the monitor and thus no signal being sent.

It is also possible that the connection between the power supply and the monitor has become damaged or disconnected.

Why Is My Second Monitor Getting No Signal?

One possible reason why your second monitor is getting no signal is due to a faulty port. 

Your graphics card may not be detecting the connection, or the cable you are using to connect it to your display may be damaged.

Check that all connections are securely seated and test with another cable if needed.

If this does not help, then you may need to replace the port or contact customer support for assistance.

Why Won’t My Monitor Recognize HDMI? 

One of the primary causes of HDMI-related monitor issues is a faulty HDMI cable.

If a monitor is unable to recognize an HDMI connection, it could be because the cable being used is either broken or has come loose.

Degrading cables can also cause this issue, especially if they are older and do not support the higher bandwidths used for modern video and audio signals.

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

When playing a game on your monitor, it can be extremely frustrating to see “No Signal” display as you start up.

This may have to do with loose cable connections from the monitor to the computer or GPU.

If any of these cables are disconnected, wiggled, or moved, it can cause the signal to be lost and result in a “No Signal” message.

In order to avoid this issue, make sure that all cables connecting the monitor to the computer or GPU/VGA/DVI/HDMI/DisplayPort are properly connected and secure.

How do I fix the no HDMI signal from your device on Windows 11?

The first step in fixing the no HDMI signal issue on Windows 11 is to check your display drivers.

Corrupted or outdated display drivers can cause this problem.

If the display driver is found to be corrupted, you should uninstall it and then reinstall the most recent version available for your device.

To install the correct driver for your monitor, you should visit the manufacturer’s website, where you can find instructions on how to properly download and install a driver update. 

You should also ensure that your device’s connection cables are securely connected and that there are no visible defects or damage to them.

Why won’t my monitor detect my PC?

This is a common problem that can be caused by a faulty connection between the monitor and the PC.

The most likely culprits are either faulty cables or a faulty port on either the monitor or the PC.

If your monitor has multiple inputs, it may be worth switching to another port to see if this solves the issue.

Another possibility is that the settings on your computer may not be set up correctly for use with a monitor. 

This could include incorrect resolution, refresh rate, or color depth settings.

Should I Use HDMI Or Display port For Gaming?

You can use both HDMI and Display port connectors for gaming. 

But when deciding between HDMI and DisplayPort for gaming, it is important to consider the type of video connection you are looking for.

DisplayPort offers high bandwidth for 4K resolutions and high refresh rates, making it great for gaming.

HDMI can also provide a good connection but the bandwidth may be too low for ultra-high resolution or refresh rate gaming.

DisplayPort cables are more reliable than HDMI when it comes to gaming since they have a higher maximum data rate (up to 32 Gbps).

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