Its hard to look for alternatives if you dont know what it really is, so i knew someone on here would know. It went bang in the middle of a job luckily it was moving in the safe Z so i was lucky the part is saved, i took the lid off and a capicitor had spat its guts out, ive replaced the cap checked the fuse but it remains on the critical list with no sign of life at all.... Im assuming it is a VFD of some description..