My assumption is that it bricked the PSU which caused other hashboards to not work as well. I would like input from others about this assumption.
Discoloration on one of chips (in middle of picture) means that it probably burnt. How or why I am not sure. What that one does I am also not sure. It's name is "copper_26". I'd appreciate if someone more tech-savy with Antminers could tell us what that chip is used for and why might it have burned?
I don't think those are chips, I think it is literally just a piece of copper. Possibly used to increase the current capacity of the signal. Can't really tell from your photo if it is just oxidation or scorch marks.