How do you fix a computer that wont turn on?
Unplug your computer and plug it directly into a wall outlet that you know works, rather than a power strip or a faulty battery backup. Make sure the power switch on the back of your power is turned on, and if the outlet is connected to a light switch, make sure the switch is turned on as well.
When I press the power button on my computer, does anything happen? If you still have nothing when you press the power button, check to see if your motherboard has any inactive lights to confirm that the motherboard is permanently receiving power. If not, then you may need a new source of energy.
What to do if your computer turns on but the screen is black?
Fix 1: Force restart your computer If all you see is a black screen after pressing the power button, try pressing the power button for 10 seconds to force shut down your PC, then turn it on. Doing this repeatedly for three times will cause the Windows startup repair to start automatically.