The best way to determine if it is doing it’s job is to measure the various power rails coming off it. If you are sure you’ve identified and removed all shorts on the power rails, then any rails not measuring properly could be a sign of damage.
From my notes, you should have 3.3v, 1.8v, 1.35v, 1.15v, and 1.1v with a ~4v supply feed from the battery. There are a few pictures floating around of where to take your measurements, Google will be your friend here.
Good luck!