Chosen Solution

I did a.motherbiard swap on.my 5 c and.wont turn on

Hmm.. Well, first things first. Check all your connections, make sure everything is where its supposed to be. If you still have the same issue, try to turn it on, while the phone is “open” and see if the backlight is still on. If not, then unfortunately tear it apart, try the old logic board, see if it will turn on, with the old one. It’s possible you got a bunk logic board