You failed to mention if the breaker was actually tripped or just off. No one said anything about solving it over the phone, you were there, we were not. Still not enough info.
What ... you expectus to solve the issue over the internet?
I guess I still need to explain the intent here.
If I give you ALL the information I have now.... after the ENTIRE PROCESS is complete..., it wouldn't be much of an exercise, now would it? Think of it as a murder mystery. They never start out with, "It was a dark and stormy night as Lord Gilbert kills Lady Penelope, his secret lover....."
I gave you all the information I started with. That a breaker trips and 'throws sparks' when turned on. The breaker marked "Waiting Room" is turned off. And the waiting room receptacles don't work.
The idea here is to teach the concepts necessary for learning to troubleshoot, not provide a detailed list of 1.____ 2.____ 3.____.
Have you ever looked in the back of an instruction manual where it lists possible issues, then gives several potential causes? IE, if your car turns over but won't fire, it could be the fuel pump, it could be the computer, it could be the timing belt, it could be a clogged fuel filter.....