Tried to put into first post. New photo maybe clearer.....http://files.engineering.com/getfile.aspx?folder=f9c3f5e3-6734-49db-a297-c6d07243124c&file=IMGP0637.JPG
Rubbish photo but the component is marked EA Cm 3
472M 46
It is like a disc capacitor 14mm diameter but with a third terminal in the middle at the back. Blue in colour in the area of the board where the power comes in. The 'C' in the component marking...