Computer wont post no display

Computer wont post no display DEFAULT

POST troubleshooting steps

Updated: 11/30/2020 by Computer Hope

POST error

The POST (power on self-test) is a set of procedures that a computer runs through each time it is turned on. It ensures that all of the system's hardware is working properly before trying to load the operating system. If the computer does not pass POST, it will not boot.

If you're experiencing POST errors when you boot your computer, the following steps may help you fix the problem.


Some of the steps below recommend removing physical parts from inside the computer. While working inside the computer, it's highly recommended you be aware of ESD (electrostatic discharge) and its potential hazards.

Remove new hardware

If any new hardware was recently added to the computer, remove that hardware to make sure it is not causing your issue. If your computer works after removing the new hardware, it can mean a few things. Either the new hardware is not compatible with your computer, a system setting needs to be changed, or the new hardware is defective.

Remove any disks or USB devices


Remove any disks, CDs, or DVDs that are in the computer. If any USB devices (iPods, drives, phones, etc.) are connected, disconnect all of them as well. Reboot the computer and see if anything changes.

Disconnect external devices

Remove everything from the back of the computer, except the power cable. Turn on the computer and see if it beeps normally. If the computer has never beeped, keep the monitor or display connected to see if any change occurs.

Reconnect and check power cords

If the computer is not getting enough power or the power is getting interrupted, the computer can encounter problems. Disconnect your power cables from any power strip or UPS (uninterruptible power supply) and connect the computer directly to a known good wall outlet.

Identify beep code

If you are receiving a sequence of beeps, see the beep code page for a listing of different beep codes and their explanation. You can also check your motherboard or computer documentation for information on the beep codes. These beep codes are meant to help identify which computer component is failing or bad. If your beep code is not listed, continue troubleshooting.

Check all fans

Make sure all fans are running on the computer. If a fan has failed (especially the heat sink fan for the CPU), your computer could be overheating or detecting the fan failure, causing the computer not to boot.

Check all cables

Verify all the cables are securely connected to the computer and that there are no loose cables by firmly pressing in each cable.

  • All disk drives should have a data cable and power cable connected to them.
  • Your power supply should have at least one cable going to the motherboard. Many motherboards may also have additional cables connected to them to supply power to the fans.

Disconnect all expansion cards

If the above recommendations still have not resolved the irregular POST, disconnect the riser board (if applicable) and each of the expansion cards. If this fixes the problem or allows the computer to POST, connect one card at a time until you determine which card is causing the problem.

Disconnect all drives

If you cannot diagnose the problem by the beep code (or you do not hear a beep code), power off the computer. Then, disconnect any IDE, SATA, SCSI, or other data cables from the motherboard. When they are disconnected, try booting the computer again.

If this resolves your irregular POST or generates error messages, reconnect each device until you determine which device or cable is causing the issue. In some situations, it can also be a loose cable connection that causes the issue.

Remove the RAM

If you continue to experience the same problem with all the above hardware removed, remove the RAM from the motherboard and turn on the computer. If the computer has a different beep code or was not beeping but is now, turn off your computer and try the suggestions below. Make sure to turn off the computer before adding and removing the memory and then turning it back on to see if the suggestion resolves the issue.

  1. Re-insert the memory into the same slot.
  2. If you have more than one stick of memory, remove all but one stick of memory and try rotating through each stick.
  3. Try one stick of memory in each slot.

If you can get the computer to boot with one or more of the sticks of memory installed, you are likely dealing with some bad memory. Try to identify which stick of memory is bad and replace it.

If you can get the memory to work in one slot but not another slot, the motherboard is likely defective. You can either workaround the issue by running the memory in a different slot that does work or replace the motherboard.

Power cycle the computer

In some situations, a computer may have power related issues often caused by either the power supply or the motherboard. To help determine if this is the issue, try turning the computer on, off, and back on as fast as possible, making sure the computer power light goes on and off. In some situations, you may get the computer to boot.


Try this method only as a temporary workaround or as a last resort to get any valuable information from the computer.

Disconnect and reconnect the CPU

For users who're more comfortable working inside their computer, reseat the CPU by removing it and re-inserting it into the socket. You should also apply a fresh layer of thermal compound between the CPU and the heat sink.

Loose BIOS chip

If your motherboard has a BIOS chip, it can become loose over time due to heat expansion and cause the computer to give an irregular POST. Gently press down on the BIOS chip to make sure it has not become loose.

Bad motherboard, CPU, RAM, or power supply

If, after trying all of the above recommendations you still have an issue, you likely have a bad motherboard, power supply, CPU, or RAM stick. The next step would be either to replace these components or have the computer serviced. If you plan on doing the repairs yourself, we suggest you replace or swap in parts from another computer that is known to work. Replace the motherboard first, then the RAM, the CPU, and finally, the power supply.


 So we have some type of Acer desktop computer. Yesterday my wife called me up stairs to look at it. The power light was on, but nothing was responding. I turned it off, then back on and still nothing. I have gotten it so far as to unplug everything from the mobo, and take the RAM out. I can turn it, but there is no video, and no beeps to indicate anything is wrong. The power light has also stopped coming on.

Obviously I don't have any spare parts at home, so I'm brining it with me to work tomorrow to see if I can get it to work. What parts should I look at first? I've never had a computer that would power on but not POST without some other tell tale sign of the issue. The CPU fan spins up and will stay on the entire time there's power to the computer.

At this point my plan is to try a new PSU, and if that doesn't work, then I have a couple of spare mobos that may or may not use DDR2 RAM.

Best Answer

Mike Soule

Thai Pepper


This usually means one of two things. 

1) PSU is near dead.

2) MoBo is near dead. 

My suggestion would be to take the PSU to another box and see if the same thing happens. If the same thing happens the PSU is bad.

Or take another PSU to that box. 
If the same thing happens here then the Mobo is bad.

Most commonly you will find it is the PSU. So try bringing a different PSU to that box first. 

View this "Best Answer" in the replies below »

16 Replies

· · ·

Mike Soule

Thai Pepper


Best Answer

This usually means one of two things. 

1) PSU is near dead.

2) MoBo is near dead. 

My suggestion would be to take the PSU to another box and see if the same thing happens. If the same thing happens the PSU is bad.

Or take another PSU to that box. 
If the same thing happens here then the Mobo is bad.

Most commonly you will find it is the PSU. So try bringing a different PSU to that box first. 


· · ·




Pull hardware, try again.

Pull a stick of memory try again.


· · ·


Ghost Chili


I'm with your plan and what Snozzberries says except I wouldn't run the PSU on another box if the 5v line is going high rather than low it can do damage to everything. If you have a multi-meter or a CRO check all the PSU voltages and if you have a CRO that the 5v signal line is putting out a clocked square wave. If you don't have test equpment just change the PSU out.

All of this is of course assuming it is not still under warranty.

A failing case fan, CPU fan or PSU fan can also pull down the voltages to the point that only LEDs and fans work, and still look like they are working. They would normally be making at least a bit of irregular noise if this was the case.


· · ·




On Dell's and Acers where the PSU connects to the Mobo pull the cable and look for Black or Darkened spots on the connector and maybe Mobo connection.

If so pull it scrap it a little and if bad, add a slight amount of tin foil to the connector.

If under warranty get a new MoBo.


· · ·




I've seen similar behavior to this before. If you power it up, you see nothing on the screen, get no post beeps, nothing,  but can hear the hard disk spin up - yes?

Pull the power cord out of the power supply and reinsert it slowly. Like you are doing it in slow-mo. And no this isn't a wind up!

You'll hopefully hear an electrical *pop*.

Hit the power switch and if it's what I think it is then it should power up. If it doesn't then I refer you to the comments above.

ATX PSU's have a 'soft' power on / off which can go bad when the PSU is right at the end of it's life. Basically the capacitors in it start failing to hold charge correctly and the PSU doesn't know which state it is in. The slow reconnection grounds the supply and occasionally can get a box back up and running at least for a short time to confirm that nothing else is fried.

If my hunch works out, just swap the PSU and you are good to go.

Good Luck!



· · ·




Perhaps some of these free diagnostic flow charts might help:

Possibly stuff you already know but I've found it helps to have some sort of methodology, just to make sure you cover all possible issues.

+1 for mobo or psu


· · ·





First have you tried a CMOS reset on the motherboard? Probably not the cause but still worth double checking you lose nothing by doing it. It really doesn sound like motherboard or PSU.

I'd go with try a working PSU on your PC if that powers everything up then you got it a bad PSU. Replace the PSU and your done.

If not test your old PSU either with multimeter or a working motherboard, a bad PSU could have caused problems on the motherboard and both could prevent powering up. If a working PSU wont power up your motherboard you are hunting down which component is causing it or the motherboard is fried. If you pull everything off your motherboard and power it up you should get some beeps. If no beeps sounds like motherboard put the components on a new motherboard and try powering up.

Course if this is an old PC I'd take the excuse to buy a new 1.


· · ·

Dave Rossi



I am with Andy, I would also pull the Bios battery


· · ·




If there is no beeps or video as you have mentioned, try out the PSU first. Most of my machines, when similar thing happens, 99% its PSU.

Good Luck.


· · ·




+1 PSU -- had the same thing happen with a friends computer.  His hard drive died, so we were going to replace it, found he had a SATA RAID card, so we got two identical SATA drives.  I figured that his old PSU, with no SATA power connectors, would not handle the load, so we got a SATA-capable PSU.  

Slapped it all together, hit the power button, lights came on.....waiting....waiting.... no beeps, no video, just the power LED.

An hour later, and I was freaked out.  I'd pulled virtually everything, and it still wouldn't so much as beep.  So, I figured, what the hell, I'll put the old PSU in.  

Fired right up.  

Went and got a IDE to SATA power adapter, and went on with my life.  


· · ·




Well it wasn't the PSU (either that, or the PSU I brought home was dead too). Now I'm off to look for a motherboard that can replace it.

The warranty was up in February too. 


· · ·




Try replacing the video card, if you have another one handy and you know it is working.

If is not the video card, I would try another motherboard.


· · ·




It's an onboard video card. I would at the very least expect it to beep frantically when nothing is connected to it (no RAM or anything). 


· · ·




Andy2830 wrote:

Course if this is an old PC I'd take the excuse to buy a new 1.

 It's barely out of warranty, and I already tried that excuse. The wife is now using my 4 year old laptop for Facebook (and that's about it).


· · ·




You know what I did and you might can do to save spending some duckets.

I have 2 lines with Verizon they were both up on the 2 year contract.

Line 1 was a phone I had a BB 8830 on it.

Line 2 was a USB UM175 EVDO data modem.

I got FREE a HP Netbook on Line 2, I activated it (to accept the contract), and then re-activated the UM175 to use on it and my other laptops or desktops.

Line 1 I got the new Curve.

I Don't think I'm ever leaving Verizon since the coverage is so good so no big deal on another 2 year contract.

FREE NETBOOK..........


· · ·

Mike Soule

Thai Pepper


@ Curtis3363: Way to look at the bright side of the situation.

Yeah I know the frustration when this happens, I am currently going through the same thing with a custom built system. And RMAing my ASUS M4N82 Deluxe tomorrow actually. :( 


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Here is a troubleshooting guide to solve why your computer isn’t posting. Try these steps to hopefully get your computer up and running, or at the very least, find out which component is most likely the cause.

It can happen to computers old and new, you go to turn on a computer and nothing happens. It’s most certainly not the best feeling in the world. The good news is that computers can be easily repaired.

Here are some of the symptoms that may be happening to indicate a no post situation:

  • Beeping: You could have a single beep or a series of beeps. Some could be short, and others long. We will go into the various beeps and their meanings later in this article.
  • Power light: It could be that you hear nothing and only see a power light.
  • Cooling fans: Your computer could have the fans spinning and nothing else much happening.

Important: For this troubleshooting guide to be effective, we are going to assume that you have checked your power supply. This can be by testing it on another computer or replacing it with a new one.

The power supply is a crucial component and we cannot ensure proper testing of any other computer component if the power supply hasn’t been checked first.

Side Note: I am not responsible for any damage you may cause. The methods in this article are sound, but I cannot take responsibility for anything that may be done outside the scope of this article.

Troubleshooting a computer that’s not posting

Go through these steps in order to help you track down the problem. By removing all of the components out of the scene first, will not only help speed up the diagnosing process but also reduce the number of components that could cause problems.

If you are hearing beeping when trying to start up your computer, you can get an idea of which component could be at fault by observing the beep sequence.

1. Set up your workspace and prepare your computer

  • Find the motherboard manual: If you can download the motherboard manual. If you have kept it, well done!
  • Get a screwdriver: Find a Phillips screwdriver that fits nicely in the computer’s screws.
  • Move to a good work area: Set your computer up in a location that’s easy to work on. Lots of free room that is clutter-free around the computer is great.
  • Ground yourself: Before touching any components, touch the computer case to limit any potential electrostatic discharges.
  • Unplug everything: Before following any of the following steps, make sure you have unplugged the power to the computer. Also, disconnect all other plugs or cables connected to your computer.

2. Disconnect all drives

Computer Not Posting? Here's A Useful Troubleshooting Guide 1
Computer Not Posting? Here's A Useful Troubleshooting Guide 2
Computer Not Posting? Here's A Useful Troubleshooting Guide 3

Unplug all the power connectors to all drives. Then unplug all data cables connected to your motherboard. You can do this at the drive end of the cable to help make it easier to reconnect. It will also help you keep track of which cable was connected to which drive.

3. Remove all add-in cards

Computer Not Posting? Here's A Useful Troubleshooting Guide 4

Unscrew all the cards that are plugged into the motherboard. Remove them all by pulling them evenly straight up and level.

If your motherboard doesn’t have an onboard graphics output, get your hands on a different graphics card and replace your existing one. If you don’t have another one to try, leave it plugged in for now.

4. Disconnect all fans (Except the CPU fan)

Computer Not Posting? Here's A Useful Troubleshooting Guide 5

Unplug all the fan connections from power. Some will be connected to the motherboard using pin header connections, and others will be plugged straight into the power supply.

Once all of them have been unplugged, check that you still have your CPU fan connected. This will be the fan attached to a heatsink that is screwed or clipped directly on your motherboard.

5. Remove the BIOS battery

Computer Not Posting? Here's A Useful Troubleshooting Guide 6
Computer Not Posting? Here's A Useful Troubleshooting Guide 7

Gently remove the BIOS battery. This is a silver coin cell battery that keeps the information held in a memory chip. This keeps all the settings for various hardware functions to operate as set by the user.

If you are unable to see it, look in your motherboard manual to find where it is situated. Sometimes some cables or drives etc. can obstruct your view.

Sometimes, I have found batteries that have gone below circuit voltage and unleashes a variety of problems. I have also found some to have high internal resistance, causing more issues.

The computer doesn’t need it to be installed to run, it will run fine without it. All it does is retain settings you have saved in the BIOS when power has been disconnected from the computer altogether.

Important: Make sure that you have no power connected to the computer for about five minutes with the battery removed before continuing.

6. Reconnect a keyboard, monitor and mains power

Plugin your keyboard, the monitor’s display cable, and mains power cable to the computer. Make sure the power is turned on.

7. Press the power button

Press the power button and observe. If the computer starts normally, congratulations! All you have to do is add each component back to find out which one was the cause.

If you still can’t get it to start, continue with the guide.

If the computer still won’t post

Now we are getting down to the final few components that will be causing a problem if you have made it this far. Follow these instructions until you reach the stage that your computer posts again.

Disconnect all front panel connectors from your motherboard. You will have to use a screwdriver, tweezers, pliers or anything else that can short out the pins instead of the power button from your computer’s case.

The correct power button pins will be shown in the manual. If you couldn’t get your hands on your motherboard manual, take a photo of the front panel connectors before removing them. The most important pins to memorize are the power button pins.

The remaining suspects:

  • CPU: This is the brains of the computer. It’s the component that processes all the information for your computer to use.
  • RAM: This keeps all the data ready for your CPU to use, amongst other things.
  • Motherboard: This is the main board secured to the computer case that everything plugs into.
  • Graphics card: It sends all visual data from your computer to be displayed on the monitor.

Eliminate the graphics card

Computer Not Posting? Here's A Useful Troubleshooting Guide 8

If you already removed your graphics card, or you are using the display output from the motherboard for the monitor, skip this step.

If you are using the original graphics card from when the computer went faulty, it’s time to swap it out with a replacement to test if it was the cause of the no post situation.

If you are on a tight budget, purchase a cheap card to get you by in the meanwhile, nothing wrong with that. It can also be kept as a test card for the future if it turns out that it wasn’t the cause of your problems.

Eliminating the RAM (Random Access Memory)

Computer Not Posting? Here's A Useful Troubleshooting Guide 9

In all of my computer repair career, I have had a handful of times where I have found RAM to be truly faulty. Quite often a RAM module is blamed when it is simply a RAM contact problem.

Please follow my guide here, on how to clean the RAM contacts properly.

If cleaning the RAM still leaves you with no posting, try leaving one module in at a time and cycle through the modules.

If the situation remains unchanged, it’s most likely not the RAM at fault.

Eliminate the CPU and motherboard

Computer Not Posting? Here's A Useful Troubleshooting Guide 10
Computer Not Posting? Here's A Useful Troubleshooting Guide 11

I’m afraid that the only way to test a CPU is by actually replacing it and seeing if the computer posts. The motherboard can be just as difficult unless you are trained to repair them.

It will be easy enough to figure out which one of them is faulty by swapping one of them out if you had the spare parts. But for most average people, spare parts aren’t just hanging around.

If you are determined to fix your computer yourself, check the motherboard for signs of damage, burn marks on components or the board, or swollen capacitors.

Computer Not Posting? Here's A Useful Troubleshooting Guide 12

If you see anything unusual, replace your motherboard. I have seen more faulty motherboards compared to CPUs, provided that some CPU overclocking was never applied.

Alternative Option: You could take the CPU and motherboard over to your local computer store to ask them to test them for you. They would most likely have spares to test either your CPU or motherboard so you can eliminate the faulty component.


Always make sure that you use your senses to assess a component’s condition.

  • Sight: Look carefully for any physical damage. It’s easy to overlook, so take your time. Use some sort of magnification too if possible.
  • Smell: Be aware of any out of the ordinary smells. Components that don’t have visible damage, could have an odor telling you something is wrong.
  • Touch: Feel for components running too hot. This can be any semiconductor or a tiny passive component. See where it connects to.
  • Hear: Listen out for odd sounds. Sometimes this can be a dead giveaway for a component that is faulty.

Your senses can be a sophisticated diagnostic tool. With practice, you will be surprised how good you can get.

Always take your time and think. Sometimes you can figure out the likely suspects by memory and reason alone.

I wish you all the best luck in tracking down your computer’s problem and that you get it posting once again!

MY PC DIED - How to fix a PC that will not post

Don't Panic! 8 Solutions to Fix PC Turns On but No Display [MiniTool Tips]

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Summary :

PC turns on but no display

This post shows 8 solutions to fix the issue of having no display while the PC is turned on. It will also introduce an professional file recovery software to retrieve lost data - MiniTool Power Data Recovery. 

PC Turns On but No Display

Q:My computer is turning on but the screen is staying black

My computer powers up all lights, fans, HDD and VGA fan… but nothing comes up on screen.... have checked all connections and monitor... was working fine... then left off for few months now nothing on screen... any suggestions will help...

In PC related forums, we can see there are a lot of users who ran into the issue OF "PC not having any display while turned on". However, not many people know quick and effective ways to fix this.

Windows's black screen of death is a common issue. Here, for a better troubleshooting guide you can see How Do I Solve Windows 10 Booting to a Black Screen with Easy.

What should you do if nothing comes up on the screen or there is a blank display after you push the power button?

Don't worry. In this post today, I will show you not one but a number of suggestions that may help you get rid of this annoying "computer turns on but no display on monitor or keyboard" issue. You can try each of them until you get rid of the error.

Part 1. How to Recover Data When PC Turns On but No Display

Data loss is a biggest worry for many users when the PC becomes unusable due to any issue. If data loss is also your biggest worry when your PC is unsable due to the black screen, you have come to the right place.

(If you're not worrying about data loss, you can directly move on to Part 2

This professional file recovery software offers MiniTool Power Data Recovery Bootable edition is designed to serve people who have trouble booting up Windows operating system. (Note: MiniTool Bootable Media Builder is only offered in the Personal and above versions.)

More importantly, this read-only tool offers wizard-like interfaces with simple operations, which can help users effectively recover lost data with no difficulty. Using it can help you easily and quickly retrieve as much data as possible when your computer runs into any problems.

Free Download

Let's see the detailed steps.

Get MiniTool Power Data Recovery Personal Edition. 

Install and launch it on a healthy computer that doesn't have any problems with booting.

Click Bootable Media icon at the top-right menu bar to create a bootable CD, DVD, or USB flash drive.

Click Bootable Media

Boot your computer from the MiniTool Bootable disk to get the following window.

the main interface of MiniTool Power Data Recovery

Select the target drive to scan, or click Devices tab to select the disk and click Scan to scan the entire device thoroughly for desired data.

If you just want to recover certain types of files like recover photos, you can click Scan Settings icon in the left menu bar and then only check the option "Graphics/Pictures" before scanning the drive.

Select all needed files in this interface, and click Save button to appoint a saving path.

Warning: Never save the selected files to the drive where you lost your data. Otherwise, the lost/deleted files will be overwritten.

recover lost data

In this window, you can use the feature Preview to view pictures and txt. files before recovering.

If there are a lot of found files, you can use the Filter function configured in MiniTool Power Data Recovery to filter out needless files by file name, file extension, file size, and creation or modification date.

filter out needless files

Hi, I effectively and quickly recovered lost data when PC turns on but no display with MiniTool Power Data Recovery.Click to tweet

With data safely transferred, you can begin to fix your computer starts but screen remains blank issue.

8 Solutions - Your PC Turns On But No Display

  1. Test your monitor.
  2. Make sure your computer has completely restarted.
  3. Verify that the power supply voltage switch is set correctly.
  4. Perform a hard reset.
  5. Clear the BIOS memory.
  6. Reseat the memory modules.
  7. Understand LED lights.
  8. Check Hardware.

Part 2. How to Fix Your PC Turns On but No Display

There are 8 solutions to help you fix the PC turns on but the screen remains black issue.

Method 1. Test your monitor.

If your computer starts but the screen is black, you should first make sure your monitor is working properly before you begin more complicated and time-consuming troubleshooting.

It's possible that your computer is working fine and your monitor is your only problem. If not, keep reading to find other solutions to fix this issue.

Method 2. Make sure your computer has completely restarted.

Ensure that your PC is coming from a completely powered-off state.

Sometimes, your computer will appear to "not be on" when actually it's just having problems resuming from either the Standby/Sleep or Hibernate power saving mode in Windows, resulting in your computer being turned on but having no display on the monitor or keyboard.

Note: While in a power saving mode, you can hold the power button down for 3 to 5 seconds to completely power off this computer. After that, turn on this PC to check whether it can boot normally.

Method 3. Verify that the power supply voltage switch is set correctly.

If the input voltage for the power supply is not correct (based on your country), your computer turns on but no display on monitor or keyboard. (You might be interested in this post: What is a Power Supply Voltage Switch?)

If this switch is wrong, it is very possible that your PC wouldn't power on at all. Therefore, an incorrect power supply voltage might prevent your computer from starting properly.

Method 4. Perform a hard reset.

If your computer is still having no display even after checking the monitor and verifying that your PC has fully power cycled, you can try booting into safe mode and then repairing Windows either using System Restore/Automatic Repair or resetting your computer.

However, sometimes, Windows Automatic Repair not working issue will happen. (For more details about this issue, please check this post: How Do I Solve - Windows Automatic Repair Not Working.) Thus, most users will try resetting PC. Resetting is very often a "magic" fix to problems like PC turns on but no display.

Importance: Do you know how to perform a hard reset? What should you do if you find your data are missing after factory resetting? Here, you can know more information as long as you check our previous post: How Do You Recover Files After Factory Reset Laptop.

If the hard reset doesn't solve the problem, proceed to the following troubleshooting solutions.

Method 5. Clear the BIOS memory.

Your computer problems might sometimes be caused by some BIOS (an acronym for Basic Input/Output System) misconfigurations.

In this case, try clearing the BIOS memory on your motherboard, which will return the BIOS settings to their factory default levels.

Note: If this method solved your issue - computer starts but screen remains blank, make sure any future changes you make in BIOS are completed one at a time so that when the problem returns, you will know which change caused the issue.

Method 6. Reseat the memory modules.

If a memory module is loose, the computer might not display an image. In other words, your computer starts but the screen is black.

Now, you can try resetting the memory modules to fix the "PC turns on but no display" issue. Remove memory module from the memory slot, and then put it back into the slot to get a better connection so that the computer can recognize the memory.

Method 7. Understand LED lights.

If your computer makes one or two short beeps before starting, it is telling you that the BIOS startup was successful.

If your computer beeps and does not start, there might be a more serious hardware issue. Now, you'll probably need to seek professional help from a computer repair service or from your computer manufacturer's technical support.

Method 8. Check Hardware.

Take a look at the actual hardware.

Try disconnecting all devices and peripherals like the mouse, external hard drive, speakers, printers, scanners, etc from the computer. Then, try turning on your computer again.

If that doesn't work, you might need to check the actual port connectors on the computer and on the monitor for damage.

Sometimes, the video port on the computer could be damaged or bent if a cable connected to it wasn't properly taken out. Additionally, some people might try to connect a cable into a connection that doesn't match, which can also end up damaging the gold or silver connectors that you see inside the port.

In this case, you should take your computer to a repair shop in order to fix the bent or damaged ports.

Bottom Line

If your PC turns on but no display, don't worry and try the solutions we have listed above to effectively fix your issue.

If you have any other good solutions for this "computer starts but the screen is black" issue, please comment them in the section below. Thank you!

Should you have any question regarding data recovery via using MiniTool Power Data Recovery, please send an email to [email protected]. We will solve it as soon as possible.

Computer Turns On But no Display FAQ

What do you do if the computer does not boot up after turning on?

  1. Check the Power Supply, Laptop Charger and Battery
  2. Disconnect All External Devices, Unplug All USB Devices
  3. Inspect Your Asus/HP/Acer/Dell/Lenovo Laptop Monitor
  4. Start Windows in Safe Mode
  5. Startup Repair
  6. Perform a System Restore
  7. Rebuild MBR
  8. Fix Boot Errors
  9. Check and Repair Computer Hard Drive Corruption
  10. Reinstall Windows

How do I fix a black screen on startup Windows 10?

  1. Check your connections.
  2. Remove or update third-party antivirus software.
  3. Perform a clean boot of your PC.
  4. Unplug & Remove external devices.
  5. Boot in Safe Mode to troubleshoot and fix a black screen problem.

How do I fix my monitor display?

  1. Check the Game Full-Screen Settings.
  2. Check the Display Settings.
  3. Update or Reinstall Your Display Adapter Driver.

How do I fix the Windows startup problem?

  1. Connect Windows bootable drive to your computer and boot from it.
  2. Select your language preferences, and click Next.
  3. Click Repair your computer.
  4. Choose Troubleshoot.
  5. Click Command Prompt.
  6. Type chkdsk /r and press Enter.
  7. Type exit and press Enter.
  8. Restart PC.



BellaFollow us

Position: Columnist

It’s going to be 6 years since Bella came to MiniTool family. She has been writing tech articles for many years. Her special focuses are video editing tips, change video format, data recovery, and manage partitions. She loves to travel and likes to try all new things.


Post display wont computer no

[Solved] Computer Turns On but No Display | 2021 Tips

Your screen remains black after turning on the PC? This is very frustrating, and you’re certainly not alone. Many Windows users are reporting this issue. But the good news is that you can fix it. Here are 5 solutions to try.

Try these fixes:

You may not have to try them all. Just work your way down the list until you find the one that works for you.

  1. Check if your monitor is turned on
  2. Reconnect your monitor to your computer
  3. Disconnect your peripherals
  4. Reinstall your RAM
  5. Reset your BIOS settings to default
  6. Bonus tip: Update your device drivers

Fix 1: Check if your monitor is turned on

If your computer starts but displays nothing, you should check is if your monitor is working properly.

Check the power light of your monitor to verify that it’s turned on.

If your monitor won’t turn on, unplug the power adapter of your monitor, and then plug it back into the power outlet. If the problem still exists, you need to bring your monitor to the repair shop.

If your monitor works fine, try the fix below.

Fix 2: Reconnect your monitor to your computer

A poor connection between your monitor and your computer might also be the cause of your problem. In this case, reconnecting the two devices is very likely the solution to your problem. Here is how to do it:

1) Press and hold the power button until your computer turns off.

2) Unplug the video cable which connects your monitor to your computer.

3) Check the port connectors on your computer and on your monitor.

If any connector on your device is bent or damaged, you’ll need to take the device to a repair shop.

4) Check to see if your video cable is damaged. If the video cable is fine, reconnect your computer to your monitor. Or, if you have another video cable available, try connecting the two devices using the new cable.

5) Try turning on your computer to see if it can boot normally.

If your computer fails again, read on and check the fix below. 

Fix 3: Disconnect your peripherals

Sometimes, certain peripherals connected to your computer may also cause the black screen issue. Try disconnecting all your peripherals to see if that’s the core problem. Here is how to do it:

1) Press and hold the power button until your computer turns off.

2) Disconnect all peripherals (your printer, scanner, mouse, etc.).

3) Try turning on your computer again.

If your computer boots correctly, that means that one of the peripherals you removed is causing your problem. You should reinstall each device back into your computer and test them each time. Then, you’ll find the specific device that causes your problem. (Replace the device once you’ve identified it. Or, consult the manufacturer of the device for assistance. )

If your computer still can’t boot correctly, try the fix below.

Fix 4: Reinstall your RAM

A poor connection between your RAM and motherboard can also cause this problem. In this case, you need to reinstall your RAM. Here is how:

1) Press and hold the power button until your computer turns off.

2) Disconnect the AC power cord from the power supply, and then open your computer case.

This process will vary depending on different types of computers. If you don’t know how to do it, consult your computer’s documentation or seek professional help.

3) On your motherboard, remove your RAM from the memory slot.

RAM looks like this:

4) Put your RAM back into the slot.

5) Connect the AC power cord to the power supply, and then turn on your computer.

If your computer still can’t boot properly, don’t worry. Check the fix below.

Fix 5: Reset your BIOS settings to default

Improper BIOS settings can also cause your PC to boot into a black screen. To see if that’s the problem for you, you should reset your BIOS to factory settings. Here is how to do it:

1) Press and hold the power button until your computer turns off.

2) Disconnect the AC power cord from the power supply, and then open your computer case.

3) On your motherboard, remove your CMOS battery with your fingernail or a non-conductive screwdriver.

The CMOS battery looks like this

4) Wait for 5 minutes, and then reinstall your CMOS battery.

5) Connect the AC power cord to the power supply, and then turn on your computer to see if your problem persists.

Hopefully, this article helped! Please let me know which method helped you, or if you have a better idea on how to fix this issue. I would love your thoughts!

Bonus tip: Update your device drivers

A missing or outdated device driver can bring various problems to your computer, so updating your device drivers should always be your go-to option to prevent your computer from further issues. There are two ways you can get the driver safely:

Manual driver update – You can update your drivers manually by going to your hardware manufacturer’s website, and searching for the most recent correct driver. Be sure to choose only driver that is compatible with your Windows version.

Automatic driver update – If you don’t have the time, patience or computer skills to update your drivers manually, you can, instead, do it automatically with Driver Easy. Driver Easy will automatically recognize your system and find the correct driver for your graphics product, and your Windows version, and it will download and install them correctly:

1) Download and install Driver Easy.

2) Run Driver Easy and click the Scan Now button. Driver Easy will then scan your computer and detect any problem drivers.

3) Click the Update button next to the graphics driver to automatically download the correct version of that driver, then you can manually install it (you can do this with the FREE version).

Or click Update All to automatically download and install the correct version of all the drivers that are missing or out of date on your system. (This requires the Pro version which comes with full support and a 30-day money back guarantee. You’ll be prompted to upgrade when you click Update All.)

If you need assistance, please contact Driver Easy’s support team at [email protected].


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Troubleshoot a PC With No POST or No Display

How to Fix a Computer That Turns on but Displays Nothing

  • Test your monitor. Before you begin more complicated and time-consuming troubleshooting with the rest of your computer, make sure your monitor is working properly.

    With the monitor disconnected from your computer, turn it on and off. If the display shows diagnostic information of any kind, you know the display is powered and is capable of displaying content.

    The 9 Best Computer Monitors of 2021

  • Verify that your PC has completely restarted and is powering up from a completely powered off state.

    A computer may appear to "not be on" when actually it's just having problems resuming from either the Standby/Sleep or Hibernate power saving mode in Windows.

    Power off your computer while in a power saving mode by holding the power button down for 3 to 5 seconds. After the power is completely off, turn on your PC and test to see if it will boot normally.

  • Troubleshoot the cause of the beep code if you're lucky enough to get one.

    A beep code will give you a very good idea of exactly where to look for the cause of your computer turning off.

  • Clear the CMOS. Clearing the BIOS memory on your motherboard will return the BIOS settings to their factory default levels. A BIOS misconfiguration could be why your PC won't start up all the way.

    If clearing the CMOS does fix your problem, make sure any changes you make in BIOS are completed one at a time so if the problem returns, you'll know which change caused your issue.

  • Verify that the power supply voltage switch is set correctly. If the input voltage for the power supply isn't correct then your computer might not turn on completely.

    There's a good possibility that your PC wouldn't power on at all if this switch is wrong, but an incorrect power supply voltage might also prevent your computer from starting properly in this way, too.

  • Reseat everything possible inside your PC.

    Reseating will reestablish the various connections inside your computer and is very often a "magic" fix to problems like this one.

    Verify that all the cables are connected correctly. For example, if the onboard video card has been disabled, plugging a VGA cable into it will result in nothing on the monitor even if the computer is powered on. In this case, you'd want to plug the VGA cable into the correct video card.

    Try reseating the following components and then test if your computer displays something on screen:

  • Reseat the CPU only if you suspect that it might have come loose or might not have been installed properly.

    We address this component separately only because the chance of a CPU coming loose is very slim and because installing one is a sensitive task.

  • Check for signs of electrical shorts inside your computer. If you find then, then you'll need to investigate the causes of those electrical shorts.

  • Test your power supply. Just because your computer's fans and lights are working doesn't mean that the power supply is functioning properly. The PSU tends to cause more problems than any other hardware and is often the cause of a computer's components to work selectively or intermittently.

    Replace your power supply immediately if it fails any test you perform.

    After replacing the power supply, assuming you do, keep your PC plugged in for 5 to 10 minutes prior to turning it on. This delay provides time for some recharging of the CMOS battery, which may have been drained.

    Do not skip a test of your power supply thinking that your problem can't be the PSU because "things are getting power." Power supplies can work in varying degrees—one that isn't fully functional needs to be replaced.

  • Start your computer with essential hardware only. The purpose here is to remove as much hardware as possible while still maintaining your PC's ability to power on.

    If your computer starts normally with only essential hardware installed, proceed to Step 11.

    If your computer still isn't displaying anything on your monitor, proceed to Step 12.

    This step is easy enough for a novice to complete, takes no special tools, and could provide you with a lot of valuable information. This isn't a step to skip if, after all the steps above, your computer is still not turning on completely.

  • Reinstall each piece of hardware that you removed in Step 10, one piece at a time, testing after each installation.

    Since your computer powered on with only the essential hardware installed, those components must work properly. This means that one of the hardware components you removed is causing your PC to not turn on properly. By installing each device back into your PC and testing them each time, you'll eventually find the hardware that caused your problem.

    Replace the defective hardware once you've identified it.

  • Test your computer's hardware using a Power On Self Test card. If your PC still isn't displaying information on your monitor with anything but essential computer hardware installed, a POST card will help identify which piece of remaining hardware is causing your computer to not come on completely.

    If you don't have and are unwilling to purchase a POST card, skip to Step 13.

  • Replace each piece of essential hardware in your computer with an identical or equivalent spare piece of hardware that you know is working, one component at a time, to determine which piece of hardware could be at fault. Test after each hardware replacement to determine which component is defective.

  • If you don't have a POST card or spare parts to swap in and out, you're left not knowing which piece of your essential PC hardware is faulty. In these cases, you have little option than to rely on the help of individuals or companies that do offer these resources.

  • Sours:

    You will also like:

    Your motherboard does not show any error codes on it?

    Using your power supply, will your DVD drive open when connected?

    Take out the battery for 5 minutes, plug it back in, do a CMOS reset again, put one ram stick in closest to the CPU, re connect all cables firmly. Unplug everything USB except the keyboard.

    Are you using an 4\8 pin to the CPU?

    Try only use graphics card in a PCI-e 2.0 lane.

    If nothing still works try a PSU from the PC you're currently using and plug in only the 24 and 4\8 pins to the board to see if it does post and beep. This should tell you if it's the PSU or not.

    It could be a RAM issue too, try another set of DDR3 if possible. If nothing still works it could be the motherboard itself.

    Also make sure there is no contact between the motherboard and the case.

    It sounds like the motherboard to me, but try the other things to just be sure.

    You're in some luck if it's the motherboard, you're warranty has not expired if it's only 6 months old.

    ASRock provide 1 year warranty service to Authorized Distributor, users should refer to the retailer or original vender RMA & Refund policy. If experiencing difficulties in warranty service through your dealer or place of purchase, ASRock will attempt to resolve this issue. For the motherboard that out of warranty, there is a $35.00 service charge + shipping for each item. ASRock America will only provide warranty service to ASRock products purchased within North America.

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