Try these troubleshooting steps to test your monitor:
1. Make sure your monitor is on. Some monitors have more than one power button- confirm that they're all switched on.
2. Check for disconnected monitor power cable connections.
3. Test that your computer is working correctly to your PC a different monitor that you're certain is working properly. Your monitor might be working fine but your computer might not be sending information to it.
4. Test your original monitor with a monitor data cable that you know is working. It's possible that the monitor itself is working properly but can't receive information from the computer because the cable that connects the monitor to the PC is no longer working.
Nonfunctional Requirements (NFRs) define system attributes such as security, reliability, performance, maintainability, scalability, and usability. They serve as constraints or restrictions on the design of the system across the different backlogs.
A non-functional monitor could be caused by a variety of issues, such as a faulty power supply, damaged display panel, or connectivity problems. Troubleshooting or seeking professional repair may be necessary.
There is a lot of times when it is necessary to have a monitor on hand in order to watch over a device or computer if it is not working normally. A non-functional monitor allows for this, as it allows for a monitor to be used in place of normal life activities. It can be used to monitor a device or computer when it is not being used, so that it is not being used and the monitor can be used instead.