A good deal of problems can keep a computer from booting up Windows (or another operating system). Fortunately, you can find a fairly good idea by imagining how and if the PC fails. Let us take a look at a number of possibilities. If absolutely nothing happens when you press the power button, then you probably have a power issue. Electricity is not getting into the PC.

1. If you discover damage, you know what to substitute.

2. If it still does not work, plug something else--such as a lamp--to the same socket. That will let you know if there's an issue with the surge protector or the electrical outlet. If your surge protector or power strip is under your desk, check to be certain a wandering toe did not turn it off.

3. If the cord is apparently fine and the socket functions, consider replacing the power cord or, in a notebook, the AC adapter. You might need to purchase one specific to your version.

4. The issue could be with the energy source. If nothing else fixes the issue, think about replacing that. Desktop power supplies are often cheap and easy to replace yourself. That’s not true for laptops. Unless you're a really skilled technician, I suggest paying a professional to do the job.

5. If the PC starts but fails before Windows can load, then enter your PC's installation program, be sure the hard disk is recognized and at the boot sequence. I went into details about this task just last month.

6. You may also think about booting using a reside Linux disk or flash drive to find out if you're able to access the contents of this drive.
For more: https://qdscleaner.blogspot.com/2021/03/when-your-computer-wont-turn-on.html