Hi my name is ***** ***** I will be the expert working with you today to help and resolve the problem you have posted.
I am sorry to hear that you are having such trouble. I will try my best to help you out and resolve the problem as quick as possible.
Unplug the power cable from the computer, remove the battery if its a laptop and then press and hold down the power button on the computer for 45 seconds and release it. Wait for 3 mins connect the ac adapter and power on the computer. Let me know how it goes.