A friend's PowerDot EMS device not charging. The USB port had every single pin disconnected from the board. Resoldering them was the entire fix.
Brought home some homework from a friend's gym. A PowerDot (a thingy that manages electrodes for EMS therapy) didn't power on or take charge. Battery had 0V so, not turning on was a given. The reason turned out to be that every single pin on the USB port was desoldered. #repair
And it pairs properly with the app.