"Why won't my battery charge when it is plugged in?"に関する回答Attempt manually turning on the phone. If it is still black try another charger, also try holding the charger at an angle. If this doe not fix it, remove the battery wait 10 seconds and try again. If this does not work you'll have to replace either the battery or the charging port and try again from there.
"Why isn’t my touchscreen working?"に関する回答Check to see if the screen is dirty or damaged. If so try cleaning the screen or replacing it. If not try powering the phone off. If nothing seems to fix it replace the screen
"Why can’t I hear my music through my headphone?"に関する回答The issue seems to be the headphone jack. First take a flashlight and check the headphone jack. If you see any residue power off the device then lightly scrap a pin/needle against the inside. Turn it back on when you finish