Start with the simplest fixes first

Most PC screen problems come from loose cables, power issues, or settings you can change in seconds. Before you assume the monitor is broken, check that the cable connecting your monitor to your PC is plugged in firmly at both ends — the monitor end and the PC end. Push each connector until you hear or feel it click. If your monitor has a power cord, make sure it is plugged into a working outlet and that the power button on the monitor itself is turned on.

If the screen is still black or blank, try pressing a key on your keyboard or moving your mouse. Sometimes your PC has gone to sleep mode and the screen will wake up when ready. If that does not work, restart your PC by holding the power button for ten seconds until it shuts down completely, then press it again to turn it back on.

Key Takeaways

  • Check that both ends of the monitor cable are plugged in firmly and that the monitor power button is on before troubleshooting anything else.
  • If your screen shows an image but it looks wrong — stretched, blurry, or the wrong colors — the problem is usually in your display settings, not the hardware.
  • Restarting your PC fixes most display problems because it reloads the drivers that control your monitor.
  • If you see a cursor or Windows logo but no desktop, your graphics driver may need to be updated through Device Manager.
  • Physical damage to the monitor itself — cracks, dark spots that do not go away, or lines across the screen — usually means the monitor needs to be replaced.

Adjust your display settings if the image looks wrong

If your monitor is showing an image but it looks stretched, blurry, upside down, or the colors are wrong, the problem is in your Windows settings, not the monitor hardware. Right-click on your desktop (the blank area with no icons) and look for an option that says "Display settings" or "Screen resolution". Click it to open the display control panel.

In Display settings, look for "Resolution" and make sure it matches what your monitor is designed for. Most modern monitors work best at their native resolution — this number is usually printed on the back or bottom of the monitor or in the manual. If the resolution is set too low, the image will look stretched or blurry. Change it to the highest number available, then click "explore" and "Keep changes".

If the image is upside down or rotated, scroll down in Display settings until you find "Orientation" or "Rotation". Change it from "Landscape (flipped)" back to "Landscape", then explore the change. If colors look wrong or washed out, look for "Color calibration" in the same menu — this opens a wizard that walks you through adjusting brightness, contrast, and color balance.

Update or reinstall your graphics driver

Your graphics driver is the software that tells Windows how to talk to your monitor. If the driver is outdated or corrupted, your screen may flicker, show no image at all, or display only a cursor and Windows logo with no desktop behind it. The fastest way to fix this is to restart your PC in Safe Mode, which loads Windows with only the most basic drivers, then update the graphics driver from there.

To restart in Safe Mode, hold down the Shift key, click the Windows Start button, click "Power", and select "Restart". Your PC will restart and show a menu with boot options. Select "Troubleshoot", then "Advanced options", then "Startup Settings", and finally "Safe Mode". Once Safe Mode loads, right-click the Start button and open "Device Manager".

In Device Manager, find "Display adapters" and click the arrow next to it to expand the list. Right-click the graphics card listed there (it may say "Intel", "NVIDIA", "AMD", or "Radeon") and select "Update driver". Choose "Search automatically for updated driver software" and let Windows find and install the latest version. Restart your PC normally when finished, and your display should work properly.

Check for loose internal connections if the screen flickers

If your screen flickers on and off, the problem may be a loose cable inside your PC case rather than the monitor itself. Power off your PC completely and unplug it from the wall outlet. Open the side panel of your PC case — most cases have two thumb screws on the back that you can turn by hand, or a latch you can slide.

Look for the cable that runs from your graphics card (a large card plugged into the motherboard, usually near the bottom) to your monitor. This cable should be plugged in firmly at both the card and the monitor. If it is loose, push it in until it clicks. Also check the power cables connected to your graphics card — some high-end cards have one or two thick cables plugged into them. Make sure these are seated properly as well.

Close the case, plug the PC back in, and turn it on. If the flickering stops, the problem was a loose connection. If it continues, the graphics card itself may be failing and may need to be replaced.

Test with a different cable or monitor if nothing else works

If you have tried restarting, adjusting settings, and updating drivers and your screen still does not work, the problem may be the cable or the monitor itself. Borrow a monitor cable from a friend or buy a replacement cable that matches your monitor type — common types are HDMI, DisplayPort, DVI, and VGA. Plug the new cable in and see if the image appears.

If a new cable does not fix it, try connecting your PC to a different monitor or TV if you have one available. Use the same cable you just tested. If the image appears on the second monitor, your original monitor is broken and needs to be replaced. If the image does not appear on any monitor, the problem is your PC's graphics card or motherboard, and you will need to take it to a repair shop or contact the manufacturer.

Know when to replace the monitor instead of fixing it

Some monitor problems cannot be fixed and mean the monitor itself has failed. If your screen has a dark spot or stain that does not go away no matter what you do, a crack in the glass, or lines running across the display, the monitor's internal components are damaged. These problems get worse over time and cannot be repaired at home.

If your monitor is more than five years old and has stopped working, replacement is usually cheaper than repair. A basic 24-inch monitor costs between $100 and $200, while professional repair can cost $150 or more and may not be available for older models. Check the warranty that came with your monitor — if it is still under coverage, contact the manufacturer to see if they will replace it for free.

Frequently Asked Questions

Why is my screen black but my PC is running?

Your monitor may be in sleep mode, the cable may be loose, or the monitor power button may be off. Press a key or move your mouse to wake the monitor. If that does not work, check that the monitor cable is plugged in at both ends and that the monitor itself is powered on. If the monitor has a light on the front, it should be lit or blinking.

How do I know if my graphics card is broken?

If you have tested a different monitor and cable and still see no image, or if your screen flickers constantly even after updating drivers, your graphics card may be failing. Try restarting in Safe Mode — if the image appears in Safe Mode but not in normal Windows, the driver is the problem, not the card. If there is no image in either mode, the card itself is likely broken.

Can I fix a cracked monitor screen?

No. A crack in the monitor glass means the internal components are damaged and cannot be repaired. The monitor will need to be replaced. Do not try to use a cracked monitor because the crack can spread and the monitor may stop working suddenly.

What does it mean if my screen shows only a cursor?

This usually means Windows is loading but the graphics driver has not loaded yet. Restart your PC normally and wait a few minutes for Windows to fully load. If the desktop still does not appear, restart in Safe Mode and update your graphics driver through Device Manager, then restart normally.

Is it worth repairing a monitor that is ten years old?

Usually not. Repair costs often exceed the price of a new monitor, and parts for older models may not be available. A new basic monitor is inexpensive and will have a warranty. If the monitor still works but the image quality is poor, you may choose to keep using it, but if it has stopped working, replacement is the practical choice.