"My iPhone screen is unresponsive and it has white and black lines"に関する回答Your screen had been broken LCD panel.
"Can't hear caller over ear speaker after screen replacement"に関する回答Check the contact of the two parts as shown in these pictures are right or not. Just the deviation is the sound heard will be very small, almost inaudible
"Can't hear caller over ear speaker after screen replacement"に関する回答1- Check the positioning screws of speaker 2- Check Speaker and cable contact points. 3- Change speaker. 4- Change front camera flex cable. 5- Check connector of front camera and speaker on logicboard.
"Turns on to apple logo then turns off after screen replacement"に関する回答After replacing the LCD screen, you use a longer screw to install conectors protecting the sheath . It causes damage to the logicboard . Your troubles are similar to the "blue" screen trouble on the ip5s. I am a technician specializing in repairing broken glass display LCD's iPhone and have encountered this case many times, and have found the cause, overcome the above error.