Not turning on after screen replacement

I got a new screen in the mail for my iPhone 6s, before starting the replacement, I turned my phone off and unplugged the battery connector from the phone itself.

After doing the screen replacement I connected all the lcd connectors to were they need to be then I plugged the battery back to the phone. Then I tried turning my phone on but got no response. I plugged it into the charger but no response, I plugged it into iTunes no response. Can anyone help me with my situation?

Could it be because of this?

It’s a small tear I accidentally did while removing it from my previous screen

Hears a picture of the entire screen

Does something need to connect to the gold dots on the upper part?