HP Touchsmart 520 pc will not start

[artisticman]

My hp touchsmart520 pc will not turn on. the lights on the power chord light up and the green light on the back of the screen lights up. When I try to start it nothing happens I tried the power chord on another computer and the chord is ok. If I unplug the chord from the back of the screen the light goes out on the back. when I plug it in it lights right back up. The last few weeks it has been having trouble with the screen needing the resolution reset whenever I tried to watch videos. 

[DavidSMP]

Greetings @artisticman,

Welcome to HP Forums and Thanks for the post.  

I understand that you are facing an issue with your computer not powering On, is that right?

Kudos to you for trying to troubleshoot the issue on your own.

Not to worry, I will be glad to help. 

Please refer to this interactive guided troubleshooter and check if it resolves the issue you are facing. 

If the issue persists, please contact our phone support team to for assistance. 

Keep me posted.