Why is my computer screen black?

A black screen can happen for many reasons—from loose cables to driver problems to hardware failures. The good news is that most causes are fixable with a few quick checks, and you can often diagnose the issue yourself without opening your computer.

Quick checks (try these first)

1. Check that your monitor is powered on and the brightness is not turned all the way down. Press your function key and brightness keys to increase the brightness.
2. Inspect the video cable connecting your monitor to your computer for visible damage, then disconnect and reconnect it firmly at both ends.
3. Try a different video cable or test your current cable with a different monitor (such as a TV) to rule out cable or monitor failure.
4. If you're using an external graphics card, remove it and restart your computer using integrated graphics instead.
5. Perform a hard reset: power off completely, disconnect all cables, hold the power button for 30–40 seconds, then reconnect and power on.
6. Reset your graphics driver by holding Ctrl + Shift + Windows key + B until you hear a beep and the screen flickers.

Connection issues with your monitor

The most common reason for a black screen is a loose or damaged video cable. Desktop users may accidentally dislodge the cable from the computer or monitor port, and laptop users with external monitors often experience this if the connecting cable is bent or worn.

• Examine the video cable (HDMI, DisplayPort, or VGA) for cuts, kinks, or bent pins.
• Power off your computer and monitor, then firmly disconnect and reconnect the cable at both the computer and monitor.
• If the screen remains black, swap in a different cable to test whether the original is faulty.
• Connect your computer to a different monitor or TV using the same cable to determine if the monitor itself is broken.
• If you're using a laptop with an external monitor, disconnect all external displays and restart to see if the built-in screen works.

Faulty display device or graphics adapter

A defective monitor or graphics card (video adapter) can produce a black screen even though your computer is running normally. You may hear the computer working—fans running, hard drive sounds—but see no image at all. This is a hardware problem rather than a software one.

• Listen carefully: if your computer sounds like it's running normally but the screen is black, the issue is likely display-related rather than a system crash.
• If you have an external graphics card installed, remove it and restart your computer using the integrated graphics built into your processor.
• Test your monitor with a different computer to confirm whether the monitor is faulty.
• If the monitor works on another computer, your graphics card or video output port on your computer may be damaged.

Graphics driver problems

Outdated, corrupted, or recently updated graphics drivers can cause your screen to go black. This often happens after a Windows update or new software installation that conflicts with your display settings.

• Try the graphics driver reset: hold Ctrl + Shift + Windows key + B for a few seconds until you hear a beep and see the screen flicker.
• Boot your computer into Safe Mode by restarting and pressing F8, F4, or Shift + F8 repeatedly during startup (the exact key varies by system).
• In Safe Mode, open Device Manager, expand Display adapters, right-click your graphics card, and select Update driver.
• If the black screen started after a recent driver update, right-click the graphics card in Device Manager and choose Roll back driver instead.
• Restart your computer and check whether the display returns.

Windows startup or boot issues

A black screen at startup may indicate that Windows cannot find a boot device, or that a system process has stalled before the login screen appears. This is different from a black screen after you've already logged in.

• Check whether your computer is trying to boot from an external USB drive, CD/DVD, or external hard drive instead of your main system drive.
• Restart your computer and enter the BIOS or UEFI settings (usually by pressing Delete, F2, F10, or F12 during startup) to verify the boot order.
• If a USB drive or external device is listed first, move your main hard drive to the top of the boot order.
• If you see a blinking cursor on a black screen, the BIOS cannot locate a bootable drive—check that your system drive is properly connected and set as the primary boot device.

Stalled Windows process or corrupted user profile

Sometimes Windows starts but a frozen process or corrupted user profile leaves you with a black screen and possibly a cursor. This can happen after an incomplete update or if a critical system service fails to load.

• If you see a cursor on the black screen, try restarting Windows Explorer: boot into Safe Mode, press Ctrl + Alt + Delete, select Task Manager, find Windows Explorer in the list, right-click it, and select Restart.
• Boot into Safe Mode with Networking to download driver updates if needed.
• If Safe Mode works but normal mode does not, use System Restore to roll back to a point before the problem started: go to Troubleshoot > Advanced Options > System Restore and select a restore point from before the issue began.
• If you cannot access Safe Mode, perform a hard reset (power off, disconnect cables, hold the power button for 30–40 seconds, reconnect, and power on).

Incomplete or conflicting system updates

A recent Windows or driver update can introduce conflicts that cause a black screen. This is especially common if the update was interrupted or if new drivers are incompatible with your hardware.

• If the black screen appeared immediately after an update, boot into Safe Mode and roll back the graphics driver as described above.
• Use System Restore to revert to a previous system state before the update was installed.
• If you can access Safe Mode, check Windows Update for any pending updates and install them fully.
• Disconnect external devices (USB drives, printers, external monitors) before restarting to reduce the chance of driver conflicts.

When to call a professional

If you've tried all the steps above and your screen remains black, the problem may be a hardware failure that requires professional repair or replacement.

• Your monitor works on another computer but not yours, and you've tested multiple cables—your graphics card or video port is likely faulty.
• You see no signs of life (no lights, no sounds, no fan activity) when you power on—your power supply or motherboard may be damaged.
• Safe Mode does not work, System Restore is unavailable, and a hard reset has no effect—your hard drive or system files may be corrupted beyond recovery.
• You've replaced the monitor and cable, removed external graphics cards, and reset drivers, but the screen remains black—internal hardware is likely failing.

Frequently asked questions

Why is my screen black but my computer is still running?

Your computer is likely running but the display is not receiving a signal. This is usually caused by a loose cable, a faulty monitor, a bad graphics card, or a driver issue. Check your connections first, then test with a different monitor or cable.

Does a black screen mean my computer is broken?

Not necessarily. Most black screens are caused by fixable problems like loose cables, driver issues, or display settings. Only if you've ruled out all software and connection issues should you suspect hardware failure.

Can I fix a black screen without restarting?

Yes, try resetting your graphics driver by holding Ctrl + Shift + Windows key + B, or adjust your screen brightness using the function key and brightness buttons. If neither works, a restart is usually the next step.

What if my screen is black with a cursor?

A cursor on a black screen usually means Windows has started but a process is frozen or a user profile is corrupted. Boot into Safe Mode and restart Windows Explorer, or use System Restore to revert to an earlier point.

Should I open my computer to fix a black screen?

Only if you're comfortable working with hardware. Start with external fixes: check cables, test different monitors, and update drivers. If those don't work, removing and reseating an external graphics card is relatively safe, but internal repairs should be left to professionals.

Can a black screen be caused by malware?

Rarely. Malware occasionally causes display issues, but a true black screen is almost always a hardware connection, driver, or Windows startup problem. If you suspect malware, boot into Safe Mode and run a full system scan.