No Display On Monitor But CPU Running [Solved!]

My heart sank when I realized my computer monitor was completely black. Even though the CPU was running, nothing was showing on the screen.

Have you ever experienced a situation where your monitor is not displaying anything even though the CPU is running?

I know this can be very frustrating and confusing, as it means that there could be an issue with either the hardware or the software.

Fortunately, there are some steps you can take to troubleshoot this problem and try to get your computer up and running again.

In this article, I’ll discuss what might cause no display on the monitor but the CPU running, how to diagnose the issue, and how to fix it.

No Display On Monitor But CPU Running [Solved!]

No Display On Monitor But CPU Running

Many users experience the issue of having their CPU running but not getting any display on their monitor. This can occur for a variety of reasons, such as a faulty power cable, loose connection, a problem with the HDMI cable or port, a faulty power supply, an old graphics card, a corrupted file system, and a faulty motherboard. 

How to fix a monitor that shows no display while the CPU is running?

To troubleshoot this issue, first, check if your power cable is properly connected to the monitor and the power outlet.

You sould also ensure that your HDMI cables are functioning properly and examine your HDMI port on both devices for any signs of damage or malfunction.

If all else fails, try checking that all connections are secure and that your power supply is working properly.

Lastly, repair any corrupted system files or replace a faulty motherboard if necessary.

By using these tips, you can easily identify why there is no display on your monitor but the CPU is running.

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

  1. Check Power Cable
  2. Check HDMI Cable
  3. Faulty HDMI Port
  4. Check Loose Connection
  5. Check Power Supply
  6. Replace Old Graphics Card
  7. Factory Reset Your Monitor
  8. Repair Corrupted System Files
  9. Faulty Motherboard
No Display On Monitor But CPU Running [Solved!]

1- Check the Power Cable

When your monitor is not showing any display even though the CPU is running, it could be an indication that the power cable is faulty.

Over time, power cables may become damaged or broken due to wear and tear.

If your power cable is indeed broken or damaged then it needs to be replaced with a new one.

However, if the power cable is not faulty then you should unplug and replug the power cable to try and resolve the issue of no display on the monitor.

It is important to ensure that the power cable is functioning correctly to avoid any other problems from arising.

If you are unsure if the power cable is broken or damaged, it would be best to replace it as soon as possible.

Additionally, be sure to check the connections of the power cable and other components to ensure that all of them are functioning correctly.

2- Check HDMI Cable

If you experience “no display on a monitor but CPU running,” it’s important to check the HDMI cable that connects your computer to your monitor.

You should check all perspectives for any broken or damaged cables.

Over time, HDMI cables may become worn or faulty and need to be replaced to ensure a proper connection between your computer and monitor.

In some cases, simply reconnecting the cables may solve the problem.

If you determine that your HDMI cable is broken or damaged, you should replace it with a new one.

If the HDMI cable is not faulty, you can try unplugging and replugging the HDMI cable to resolve the no display on monitor issue.

3- Faulty HDMI Port

Having an issue with a monitor not displaying anything, but the computer is still running, could be due to a faulty HDMI port.

The HDMI port allows for audio and video to reach the display from the computer, so if it is not functioning correctly, then nothing will be shown on the screen.

To check if this is the cause of the issue, try connecting the monitor to a different computer or device.

If it works with another device, then the HDMI port on the original computer is likely faulty.

To fix this, you can try using an alternative connection method such as DVI or VGA.

Both of these connections are also capable of providing audio and video from the PC to the display of the monitor.

4- Check Loose Connection

Checking for loose connections is an important step in troubleshooting a computer that is not displaying anything on the monitor even when the CPU is running.

It is possible that the monitor and CPU are not connected properly, or that one of the cables has become unplugged due to external forces.

To check for loose connections, start by ensuring all visible cables are firmly connected. Inspect each cable for any signs of damage.

If any of the cables appear to be frayed, torn, or otherwise damaged it could be causing a lack of connection between the monitor and the CPU.

Replace any damaged cables with new ones that meet the correct specifications for your system.

Additionally, ensure that any port covers or protective pieces are properly secured and make proper contact with their corresponding pins. 

5- Check Power Supply

Checking the power supply is also an important step when troubleshooting a computer with no display on its monitor but the CPU running.

It is necessary to ensure that all components of the power supply are functioning correctly and providing adequate power.

The first step in checking the power supply is to inspect all cables and connectors, ensuring they are connected properly and securely.

If any of them appear damaged or loose, they should be replaced.

Next, it is important to open up the PC case and inspect the internal components for signs of dust, grime, or debris buildup that could obstruct airflow and cause overheating issues.

The fan should also be inspected for proper operation, as well as any other visible signs of damage or wear on components such as capacitors, resistors, etc.

6- Replace Old Graphics Card

Malfunctioning graphics card can also cause an issue with your monitor not displaying images, but the computer is running.

A graphics card plays an important role in processing and displaying data on the screen, so if it is not working properly, you won’t be able to get any visuals from your monitor.

To fix this problem, you should replace the old graphics card with a new one.

Once you’ve chosen a suitable replacement, use static protection when handling the components by avoiding contact with any metal surfaces or objects such as jewelry. 

This will help prevent damage caused by static electricity discharges while handling sensitive electronic parts such as video cards.

Follow the instructions included with the new card to install it correctly in your PC’s motherboard slot (usually PCI-E).

Once everything is securely installed, connect any cables from the power supply and/or monitor/TV that is necessary for operation. 

7- Factory Reset Your Monitor

Factory resetting a monitor can help resolve many problems, such as no display when the CPU is running.

To perform a factory reset on your monitor, you will need to locate the ‘Reset’ button on the back of the monitor.

Pressing this button will restore all of your monitor’s settings to their factory defaults. 

Depending on the make and model of your monitor, you may need to hold down this button for up to 30 seconds for the reset to take effect.

Once you have factory reset your monitor, you should be able to receive the video feed from your CPU once again.

If not, it is recommended that you check with your manufacturer’s website or technical support for further troubleshooting information.

8- Repair Corrupted System Files

Repairing corrupted system files is a complex process that requires both technical expertise and an understanding of the operating system being used.

When a computer fails to display any images on the monitor but the CPU is running, it could be due to a variety of issues ranging from software corruption to hardware malfunction.

System files are often at the root of such problems, and if left unchecked can cause more serious damage to your system.

The first step when repairing corrupted system files is to identify the source of the issue.

In many cases, this can involve reviewing error logs or analyzing performance metrics to pinpoint where exactly in the system something has gone wrong. 

Computer viruses and malware can also cause these types of issues, so it’s important to make sure that your anti-virus and security software is up-to-date.

9- Faulty Motherboard

A Faulty Motherboard can cause a computer to experience no display on the monitor, even if the CPU is running.

This can be caused by a wide range of issues, from an overloaded power supply or bad RAM modules to a failing motherboard itself.

In most cases, the underlying issue is related to either power delivery or data paths within the motherboard.

Potential problems can include faulty capacitors, bad connections, broken chipsets, corrosion, or general physical damage that affects the integrity of the circuit board assembly.

It may also be possible for virtually any part of the motherboard to fail and cause this issue.

It is important to inspect all parts of the motherboard and test each component individually until the source of failure is identified and replaced.


In conclusion, if there is no display on your monitor but the CPU is running, you can troubleshoot by following these steps:

  1. Check Power Cable
  2. Check HDMI Cable
  3. Faulty HDMI Port
  4. Check Loose Connection
  5. Check Power Supply
  6. Replace Old Graphics Card
  7. Factory Reset Your Monitor
  8. Repair Corrupted System Files
  9. Faulty Motherboard

If the monitor still flickers on 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.


Why is my CPU running but my monitor is black?

If your CPU is running but the monitor is black, multiple reasons can cause this problem.

One possible reason is that your computer’s monitor has gone into a power saving mode or the display settings have changed. 

To check this, force restart your computer by pressing and holding the power button for several seconds until it turns off, then turn it back on again.

If this does not resolve the issue, try connecting to another monitor to see if it displays properly.

How do I fix my monitor with power but no display?

If your monitor has power but no display, then one possible solution could be to unplug the monitor power cable and wait for at least 30 seconds before reconnecting it.

After reconnecting the cable, you should then turn on the monitor. 

This can help reset any strange behaviors that may have caused the display to not show up. 

If this does not work, then you may need to try a different method such as checking your cables and connections or performing a hardware reset.

Can a dead CPU cause no display?

Yes, a dead CPU can cause no display.

The CPU is responsible for interpreting instructions sent by the operating system, and without it functioning properly, the computer will not be able to carry out its tasks. 

Without a working CPU, none of the instructions sent by the operating system will be executed and thus, nothing will appear on the monitor.

In other words, a broken CPU will cause the entire computer not to start. 

If your computer is suffering from this issue, the best solution is to replace the faulty CPU with a new one.

Can faulty RAM cause no display?

Yes, faulty RAM can cause a computer to have no display.

This is because RAM (random access memory) is responsible for temporarily storing data that the processor needs to access quickly to run programs.

RAM is responsible for the functioning of the computer including the operating system and any software or applications.

If the RAM is not functioning properly, the processor cannot access this data and will be unable to start the computer.

How do I reset my black screen of death?

To reset your black screen of death, you need to reboot your computer.

Press the Windows key and then hold down Ctrl + Shift + B at the same time.

This should force your display to signal again, allowing it to wake up from sleep mode or restart from a complete power-off state.

If that doesn’t work, you may need to update or replace certain hardware components such as your graphics card’s driver software. 

How do I know if my motherboard is fried?

If you are smelling smoke or seeing charred circuitry coming from your computer, then it is likely that the motherboard has been fried.

The most definitive way to determine whether or not your motherboard is fried is to open up your computer and check for signs of damage.

These signs could include discoloration on the printed circuit boards, burn marks, or even a distinct burnt smell.

If you are unable to open your computer due to the damage, then it is likely that the motherboard has been fried and will need to be replaced.

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