lol, is that A or B?
Now, i'm only posting because no-one else is trying to help, but beware i am NOT an expert. However, this is what i'd do....
I suspect it's A. If so, open it up, get a couple of wires and put them on either side of the switch. You can put these wires together to simulate switching the pedal on with the footswitch. If you don't get the pop, replace the switch. If you do get the pop, your pedal is f*cked.
If it's B, your pedal is f*cked.
When I say f*cked, I don't mean it can't be repaired, I just mean it will probably have to go to a pro. There are a few guys on this board that repair pedals.