I tried to replace the bulb inside my oven yesterday, which was really tricky as the wires to the back of the light were tight, while trying to remove the bulb the bare wire touched the oven sparked and the oven went off. It didn't trip the breaker, but the oven is now completely dead the board is in responsive no lights work in the oven or on the main panel, but there is a buzzing noise coming from the right hand side of the board from a puck shaped black object on the board.
I know I should have cut the power BEFORE hand, but I didn't think replacing a bulb would have been such a big deal.

I presuming I have killed the board and will have to get it replaced, but wanted to know if it was something else before replacing the board.

Thanks in advance

Andy

Here is a picture of the black part that's buzzing... https://goo.gl/photos/QyS5VoZskygJGvQc8

Could it not be the transformer, the panel does still beep when first powered up. There is no oven light either which is why I was thinking ( going) it may have been the transformer. Is there a way to check?