Power Button Not Working PC
The power button on your system is an essential component.
However, sometimes you find nothing happens when pressing that button.
Here is a related post for you How to Tell If PSU Is Failing?
How to Test PSU?
Besides, you should check cables and connections from your PSU to ensure they are connected correctly.
Clean the Power Button
If the debris enters into the power button, it may stop working.
What you better do is to clean this button.
Conclusion
All these operations to fix PC power button not working are not simple.
Or else, things may get worse after mistaken operations.