Screen removal kit - pixels on new screen

Hi, just went through the full screen replacement guide. Bought the whole kit from you with a genuine display included. When I reinstalled the new screen and turned on the phone I wont get anything to display on the screen. I just get some pixels of color randomly and that's it. The old screen worked just fine before i removed it. I removed it because the glass was broken. During the removal I had to use some force so I'm pretty sure the old screen is fully dead by now. However the new screen I manedged to install very gently. I tried to replug the connector once and it feels like it's seated like it should in the connector.

Any advice would be appreciated.