No power after screen repair

Dropped camera now it won't turn on.

Screen replacement now wont display image.

Boot loop on att logo

Battery replaced now "No Network Connection"

APPLE Slowing down old iPhones, will replacing battery fix it?

Shows charging but then says isnt charging

No netowrk connection after screen replaceemnt.

Powers on only with power button held in.

Charging port replacement stuck on apple logo