outside AC unit is not cooling, makes a buzzing noise every couple minutes.

My central air conditioning unit is not cooling. I went to check the outside unit, and the fan is spinning, but I can't tell if the compressor is turning on. But every couple of minutes it makes a buzz noise.
A couple of weeks ago, my breaker box got wet, were not sure how, but a lot of the breakers were full of water. Since then the AC breaker made a loud buzzing noise in the same intervals as the outside unit. We replaced the breaker, and the buzzing inside stopped, but the outside unit still makes a buzz noise, and the air in the house is warm.
I just wanted to know if there was a way to fix this myself, or if I should just give up and call somebody. Normally my dad would be able to fix this, but he's currently away for a couple of months and I'm here by myself. I have a little experience working with window units, but never with central units, so my knowledge is minimal. So if it's much too complicated, I may not be able to do it myself.

 

Open the electrical panel to the outdoor unit and look for burned wires or a capacitor that is swollen on top.



This cap is very swollen but even a little swollen is bad.


Capacitors do not always swell on top when they are bad but they always require replacement if swollen.

 

I replaced the capacitor, and the contactor because it looked like it had burned a little, but I still have the same problem.

 

Turn off the service disconnect or breaker and remove the cover over the compressor terminals to look for burned wires.



If it looks like the top picture it is a lost cause but if it is only a melted wire connection repair kits are available...



Do you own a meter?