I acquired a second hand Pi 3B+ today but unfortunately it had a loose component on the underside of the board (3 pad component beside the SD card slot)
While trying to fix it with a soldering iron I knocked the component completely off. The pi still powers on but yields a low-voltage warning when plugged in via micro-usb (5v 2A).
How critical is it to fix this?
What is the feasibility of fixing this damage without professional help?
What component this is (in case I can source a new one to fix myself)?