There are a few possible causes of a monitor intermittently going black. This can be a frustrating situation, and in order to resolve the issue, it’s important to understand what the problem might be.
The most common culprit is a loose connection between the monitor and the computer. If the connection between the video cable and the video port on your computer or monitor has become loose, then this could cause the monitor to go black periodically. The solution for this is to make sure that all the connections are secure and properly plugged in.
Another common culprit is a failing monitor. If the monitor is old or has suffered from heavy use, then it may be that the monitor is failing and needs to be replaced. The monitor should be tested with another computer as well, to ensure that the monitor itself is not the cause of the problem. If the monitor works ok with another computer, then the problem is likely to be some form of driver or hardware issue with the original computer.
Finally, the problem may be due to a faulty video card or driver. Video cards often require drivers to be installed in order to work properly. If the correct driver is not installed or the video card is old or defective, then this can lead to the monitor intermittently going black. To resolve this issue, you can try updating the driver of the video card or replacing the card itself.
Although most of these causes are relatively easy to diagnose and fix, if none of the above solutions work, then you may need to take your computer to an IT professional who can take a closer look at the issue. They will be able to identify and resolve the underlying problem, allowing you to get back to using your computer with a functioning monitor.