There are a variety of reasons why a computer monitor may be blank, and there is no one definitive answer to this issue. The following steps should help in resolving your issue.
1. Check power connections. Ensure the monitor is plugged in to the correct power source and that all necessary cables are securely connected. If you have a surge protector, make sure it is plugged in and on as well.
2. Check the video card. Make sure the video card is securely connected to the motherboard and that the drivers are up to date. You can also use a different monitor to check if it is a display issue or a video card issue.
3. Restart your computer. If the monitor is still blank after checking the power connections and video card, restart your computer. If the monitor displays something during startup, the issue may be with the display settings. If the monitor remains blank, continue to the next step.
4. Verify the monitor is working properly. Disconnect the video cable from the back of the computer and test it with another computer. If the same issue occurs, you may have a defective monitor. Try connecting a different monitor to your computer and see if it displays correctly.
5. Test the connections. If the monitor is still blank, check all of the connections between the monitor and computer. Make sure the cables are securely connected. It may also be helpful to move the cables around slightly to see if the display changes.
6. Check the monitor settings. If the monitor is still blank, try changing the settings on the monitor. Many monitors have a menu button which can be used to access these settings. Check the brightness, contrast, and other settings. Some monitors require an external power adapter to adjust their settings, so make sure it is present and working properly.
7. Check your display driver. If the monitor continues to be blank, you may need to update or reinstall your display driver. You can do so by downloading the driver from the manufacturer’s website. Be sure to follow any instructions pertaining to installation and restart your computer after the driver is installed.
8. Test the monitor with a different computer. If the monitor is still not displaying anything, it is possible that there is an issue with the monitor itself. Try using the monitor with a different computer to see if the issue persists.
Hopefully these tips have helped resolve your issue. If none of these steps have worked, or you believe your computer monitor is defective, you may need to contact the manufacturer for further assistance.