There are several possible reasons why a monitor may not display anything. It could be due to an issue with the monitor itself, an issue with the video card, an issue with the power cable, or an issue with the connections between the monitor and the computer.
1. Monitor not powered on: The first thing to check is to make sure that the monitor is actually powered on. The most common way to do this is to check if the monitor has a power light on it. If there is no light on, the monitor is not receiving any power. Make sure the power cord is firmly plugged in both at the power strip and in the back of the monitor. If this is not the problem, then proceed to the next section.
2. Monitor settings: Depending on the type of monitor you are using, there may be specific settings that need to be adjusted for the monitor to work properly. For example, some monitors have additional settings such as brightness, contrast, and color. It is possible that the current settings may be causing the monitor to not display anything. To fix this, you will need to access the menu settings of the monitor and make changes until the display works properly.
3. Video card: If none of the above solutions worked, then the next thing to try is to make sure the video card is working properly. To do this, you can either open up your computer and inspect the card itself, or you can try connecting a different monitor to your computer and see if it displays properly. If the second monitor works, then there may be an issue with the video card. You may need to replace the card or reinstall its drivers.
4. Cable connections: The last thing to check is the connections between your monitor and the video card. Make sure the video cable is firmly connected and seated in both the card and the monitor. Try using a different cable if possible, as the current one could be defective or worn out. Also, check to make sure the connectors match up with the correct ports on both the monitor and the video card.
If none of these solutions worked, then it is likely that the monitor itself is faulty and needs to be replaced. If you are still having issues, contact the manufacturer of the monitor for more assistance.