Sorry to hear about your system!! It is unusual to hear issues with a PC Power&Cooling PSU, since they are generally considered one of the best.
It can happen for various reasons; faulty PSU (most likely), power surge, short, over load (system demand higher than PSU can handle)... Etc. Your other components should be fine but can't say for 100% nothing else was damaged.
I recommend testing your system with a secondary PSU to make sure no other damage. If PC works, RAM the PSU for a replacent.