"USB Ports not working"に関する回答I Have the same problem too, to fix any usb port on MacBooks, the motherboard needs to be replaced, there is no other option if is a hardware problem
"Is there a free app to test the health/capacity of a non oem battery?"に関する回答Try by installing the official apple support app on your phone and start a chat session at apple.com and ask the technician online for a battery health test. That would be more accurate and secure than a free app.
"How do I transfer data if my old iPhone has a busted LCD?"に関する回答you can try by connecting the device to Itunes and back up the broken device. Before you do any repair on your device make sure to back up your data first.'
"Does not turn on unless plugged in"に関する回答It has to be some problem with the battery. is it holding charge while is plugged in the wall?