I’m student as well as IPhone repairer too.
I like to repair any iPhones easily.
For any help message me I’ll help you out
Answer to "Why Is my brand new screen having lines?"Nowadays lcd is also comes faulty.so you must put another lcd in logic board. If still it will happen same thing then it’s logic board isse I where the lcd flex cable connects.there might be a dust or not fit properly cables .
Answer to "Restarts after screen replacement"That’s a new lcd issue. You change the lcd then try it.becuase there are some problems in lcd also when u change lcd,phone gets restarts, type anything in lcd etc.
Answer to "Phone rings but no one can hear me and can't hear them"That’s a ear speaker problem.so you have to replace it.
Answer to "My iPhone works but the screen doesn't?"Make sure that lcd flex cable is fitted properly in the logic board.
Answer to "Home Button Not Working After Battery Replacement"Make sure that home buttons 2 connector are not broken when it connects.