I have no backlight or display after replacing the lcd/digReplaced the entire display and now i get NOTHING. Don't know where the backlight chips/assembly is. There is no backlight or...
Answer to: No SIM card problemI work at an electronics repair store, most of the time the solution is either a new sim card, or reset network settings (you'll have to reenter wifi passwords, but your phone will probably work, worth it).
Answer to: I replaced the screen, but now it freezes with lines after a min.I would try another screen (if you have one). just sounds like a little to much/little solder on the screen (not plug) side of the connection. Trying this first will likely save you a lot of wasted time on software troubleshooting.