Pixracer repair

Hi, as I’m very not enough concentrated to what I am doing, I did a bad manipulation and over voltaged my Pixracer… very stupid, I agree, double check rules! Now I when I connect it via USB I can see it in the device manager but no heartbit in Mission Planner. I think the “burned” component is one of the 5 pins voltage regulator situated just under the buzzer-safe switch connector, sd card side of the board, even if I can see no burning evidence. As I’ve nothing to loose and as I want to improve my soldering skills I want to know if changing this is a good solution. On the top of the components I can read WM168 and the other one LLVB. Can someone give me the true reference of these components? Or maybe this is better to check something else before doing this? Thanks, Chris