Stopped working, brushes look fine. What might be wrong?

Stopped working, brushes look fine. What might be wrong?

I was cutting a ridge in a board, stopped inbetween to sand and check if it is wide enough to fit my board and the dremel just wouldn't turn back on. I opened it because I thought there might be dirt inside but not really. The brushes are still 1/2 inch+ so it can't be that and tested on different outlets.