I did a screen replacement for an iPhone 7 plus (oem screen) and before I put all the screws and plate on it I test it and it functions fine. When I put the front camera sensor the home button the back plate and the screws that go on the motherboard ( I made sure I didn't misplace them because that could cause the phone to get a blue screen) and close up the phone it keeps restarting just on the Apple logo. Sometimes it would go to the home screen for like 5-10 mins then it shuts back down.
I asked around and they told me it's because of the front camera theirs a sticker that needs to be intact with the camera ( if you don't heat it up good ) can this be true ? Maybe it fried the front camera and it's not letting it turn on ? Anything helps guys thanks !