How to Troubleshoot a Black Screen of Death on a Computer

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Why your computer screen is black but still running & how to fix it
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Is your computer monitor displaying a black screen even though your computer is still running? There are a variety of reasons for a black screen of death. It could be a connection issue, an issue with your hardware, or a software issue. This wikiHow article teaches you how to troubleshoot and fix a black computer screen on a computer that's running with expert tips from computer and tech specialist Luigi Oppido.

Fix a Black Screen of Death

Check your connections to make sure the cables and your monitor are connected and working properly. See if your computer can boot into Safe Mode. If so, try updating Windows and your graphics drivers. Reset Windows as a last resort. If that doesn't work, your computer may need repairs.

1

Check your connections.

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  1. According to Oppido, if your monitor is not displaying an image, you should check the connections to your computer. Does your monitor have a stand-by light on? Make sure the cables aren't damaged. Try using a different cable. Make sure the cables are connected to the correct port (i.e. the graphics card rather than the on-board display output).
    • If your cable is not working, it will need to be replaced.
    • If there is any dirt or debris in the connectors or ports, you can remove it with compressed air, or you can use a small, dry, soft-bristle brush.
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2

Check if the monitor is working.

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  1. Try connecting your monitor to a different computer or device, then see if you are able to get a display that way. If you are using a laptop, try connecting to an external monitor. If you are not able to get a display when connected to any device, the issue is most likely with your monitor. You may need to replace your monitor. If you can get a display on a different computer, the issue is most likely with your computer.
3

Check your monitor's settings and light levels.

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  1. Check the brightness settings on your monitor. Make sure it hasn't been turned all the way down. Also check the source input. Make sure it is set to the correct HDMI or DisplayPort input source.
    • The brightness settings settings usually have an icon that resembles a sun. On laptops, it's usually one of the F-keys.
    • The source input button usually has an icon that resembles a rectangle with an arrow.
    • If your monitor has the capability, you can also update your monitor's firmware.
    • If your monitor has the capability, try resetting it to its factory settings.
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4

Use keyboard shortcuts (Windows).

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  1. There are a couple of quick keyboard shortcuts you can use in Windows to solve display issues. One will wake your computer if it's not coming out of sleep mode. Another keyboard shortcut will reset your graphics drivers if they are not responding. Use the following keyboard shortcuts to try to resolve the issue: [1]
    • Press ⊞ Win + Ctrl + Alt + Del + P to wake your computer from sleep mode.
    • Press ⊞ Win + Ctrl + ⇧ Shift + B to reset your graphics driver.
    • There’s no direct way to reset your graphics card on a Mac, but you can reset your System Management Controller (SMC) , which may help. The right way to do it depends on what kind of processor your Mac has.
5

Restart your computer.

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  1. You can often fix minor glitches by restarting your computer. If you can't navigate to the Power options on your computer, press and hold the Power button on your computer until your computer powers off. Unplug your computer for 30 seconds and plug it back in. Then press the power button again to turn it back on.
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6

Boot your computer into safe mode (Windows).

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  1. Safe mode boots your Windows computer with the minimum startup programs and drivers needed to run your computer. If you are able to get an image on your monitor in Safe Mode, you can use Safe Mode to troubleshoot the problem. If you can't access Windows without a display, you can try booting into Windows via the Windows Recovery Environment (WinRE). Use the following steps to boot into Safe Mode :
    • Shut down your computer.
    • Power your computer on.
    • Immediately press and hold the power button to force it to shut down.
    • Repeat three times to boot into Windows Recovery Environment.
    • Click Troubleshoot .
    • Click Advanced Settings .
    • Click Startup Settings .
    • Click Restart .
    • Press "5" for Safe Mode with Networking.
7

Access macOS Recovery

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  1. If you are using a Mac, you can use macOS Recovery to troubleshoot problems with macOS. Depending on what’s causing the issue, you might be able to get your monitor to work in recovery mode. From there, you can run a startup disk repair to repair your disk drive. If that doesn't work, you can reinstall macOS. If you are not able to access macOS Recovery, or the problem persists, you'll need to have your Mac repaired or replaced. Use one of the following steps to access macOS Recovery: [2]
    • Apple Silicon: Most Macs produced after 2021 have an Apple Silicon chip. To access macOS Recovery on an Apple Silicon Mac, power your Mac off. Press and hold the Power button until the Startup options screen appears. Click Continue below "Options."
    • Intel Mac: If you have a Mac that has an Intel chip (most older Macs), power your Mac off. Press the power button to power it on. Immediately press and hold Command + R until you see the Apple logo or spinning globe. You may be asked to connect to Wi-Fi or connect an ethernet cable.
    • Once you boot into macOS Recovery, select Disk Utility . Use this tool to repair your internal hard drive. If this doesn't fix the problem, boot into macOS recovery and select the option to reinstall macOS. If that doesn't work, select Disk Utility and select the option to erase and reinstall macOS. This will wipe all the data on your hard drive. If that doesn't work, your macOS will need to be repaired.
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8

Update your operating system.

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  1. Keeping your operating system and your drivers up-to-date ensures they are running properly and efficiently. It also helps patch out any bugs or flaws that may be causing display issues. When you update Windows or macOS, it generally will update your drivers automatically. If you are able to access Windows or macOS temporarily or in Safe Mode or Recovery Mode, use the following steps to update:
    • Windows :
      • Click the Windows Start button.
      • Type Windows Update .
      • Click Windows update settings .
      • Click Check for updates .
      • Click Download & install all .
    • Mac :
      • If possible, go to Apple menu > System Settings > General and select Software Update . If an update is available, click Update Now .
      • If you can only access your display in recovery mode , select the Reinstall macOS option to reinstall the most recent installed version of macOS. If your monitor works after that, you can upgrade to a newer version of macOS if one is available.
9

Update your graphics drivers manually (Windows).

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  1. If updating Windows doesn't fix your display issues, you can try updating your graphics drivers manually. You can update your graphics drivers via the NVIDIA Control Panel or AMD app or by downloading the latest drivers from the manufacturer's website of your graphics card. You can also use the following steps to update your graphics drivers via the Device Manager:
    • Right-click the Windows Start button.
    • Click Device Manager .
    • Expand Display adapters .
    • Right-click your display driver (there may be more than one).
    • Click Update driver .
    • Click Search automatically for drivers .
    • Follow the prompts to install the latest drivers if one is found.
    • You can’t update your drivers manually on a Mac. They will be automatically updated when you update macOS.
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10

Scan for viruses.

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  1. Your Mac has several layers of built-in virus protection that work automatically, but you can always install a third-party antivirus app to look for infections—assuming you’re able to get temporary access to your display. On a PC, you can scan for viruses using Windows Defender in regular mode or Safe mode. Use the following steps to do so:
    • Click the Windows Start menu.
    • Type "Windows Security."
    • Click Windows Security .
    • Click Virus & threat protection .
    • Click Quick scan or Scan now .
11

Disconnect all accessories.

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  1. Sometimes external devices can interfere with your computer's operations, especially during startup. Disconnect any USB devices plugged in. This includes external hard drives, game controllers, mice, keyboards, and VR headsets. See if this fixes the issue.
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12

Rollback your graphics drivers (Windows).

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  1. In some rare cases, an update to your graphics driver may cause issues with your system. If the issue with your graphics driver started after a Windows update, you may want to try rolling back your graphics drivers. Use the following steps to do so:
    • Right-click the Windows Start button.
    • Click Device Manager .
    • Expand Display adapters .
    • Right-click your display driver (there may be more than one).
    • Click Properties .
    • Click the Driver tab.
    • Click Roll Back Driver .
13

Uninstall recent updates.

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  1. If an update isn't fully applied, it may cause problems with your system. Unfortunately, it’s extremely difficult to roll back updates on Mac, so your best bet is to reinstall macOS in Recovery Mode , if you’re able to do so. You can use the following steps to uninstall a recent Windows update either in regular mode or Safe mode:
    • Click the Windows Start menu.
    • Type Windows update .
    • Click Windows Update Settings .
    • Click Update history .
    • Scroll down and click Uninstall Updates .
    • Click Uninstall next to the latest updates.
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14

Reset your BIOS (Windows).

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  1. The BIOS is the firmware on your computer's motherboard. It is responsible for activating your hardware when your computer starts up and interfacing your hardware with your computer's operating system. If your BIOS settings have been altered, it may interfere with your display.
    • The way you boot into the BIOS is different depending on your computer manufacturer. There is usually a button you can press while your computer boots up to enter the BIOS. Common keys include F1, F2, F10, F12, Del, and Esc. Consult the user's manual or manufacturer's webpage if you need assistance.
    • The BIOS menu is different depending on your computer's manufacturer. Once you boot into the BIOS locate the option to reset the BIOS to the factory defaults. Select this option and then save and exit the BIOS.
15

Reset Windows

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  1. If you can boot into Windows Recovery Environment (WinRE), you may be able to reset Windows. This will reinstall Windows. You have the option to keep your files or remove everything. You can try to keep your files, but if that doesn't work, you may need to remove everything and completely erase everything on your disk drive. Use the following steps to reset Windows: [3]
    • Shut down your computer.
    • Power your computer on.
    • Immediately press and hold the power button to force it to shut down.
    • Repeat three times to boot into Windows Recovery Environment.
    • Click Troubleshoot .
    • Click Reset this PC .
    • Click Keep my files (click Remove everything if this doesn't work).
    • Click Cloud reinstall (you can click Local Reinstall if you don't have an internet connection).
    • Click Yes or No when asked if this is a work place computer.
    • Click Fully clean the drive (if you are removing your files).
    • Click Reset .
    • Follow the prompts to set up Windows when your computer is finished reinstalling Windows.
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16

Repair or replace your computer.

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  1. If you have tried everything and you are not able to get a display on your monitor or any other monitor, there may be a hardware problem with your computer. There may be an issue with the power supply unit, the motherboard, or your graphics card. You may need to take your computer in to have it serviced or purchase a new computer. Take your computer to a qualified computer technician to have it repaired.
    • Contact the computer manufacturer or point of sale to see if your computer is still under warranty. If your computer is under warranty, the manufacturer or point of sale may be able to repair or replace your computer at no charge or at a discounted price.
    • If you have a Mac, you can get service from https://getsupport.apple.com/solutions .
EXPERT TIP

Luigi Oppido

Computer & Tech Specialist
Luigi Oppido is the Owner and Operator of Pleasure Point Computers in Santa Cruz, California. Luigi has over 25 years of experience in general computer repair, data recovery, virus removal, and upgrades. He is also the host of the Computer Man Show! broadcasted on KSQD covering central California for over two years.
Luigi Oppido
Computer & Tech Specialist

Try replacing your computer parts. If you have the technical skills and the parts, try replacing the graphics card or adding a new one. You can also try replacing the power supply unit or the motherboard.


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      References

      1. ↑ https://www.securedatarecovery.com/blog/pc-turns-on-but-no-display
      2. ↑ https://support.apple.com/en-us/102575
      3. ↑ https://www.youtube.com/watch?v=HIRuMV5B_Ak

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