20分钟 - 2小时
My Nexus 7 was no longer charging. I found that the problem was the usb port.
Between the tool I bought and the video dealing with replacing the USB port and Sound jack this was an easy fix. I opened the back removed the correct screws and unplugged the cable then removed the old unit. It was easy to install the new unit put the screws back and installed the back. Everything worked fine and the unit will now charge.
Don't be afraid to attempt repairs to tablets.