Recently, our theatre has had a rash of non-working heads for our Lekos. With a limited amount of fixtures and a rapidly dwindling supply of working heads, I am in dire need of some advice for fixing them. I've tested all of our cables and aside from a few twofers, all of them are operational. We just installed a new dimmer rack and it undergoes it's daily check for operation. So aside from the amateur who wired our rack and switched dimmers around (dimmer one is now seventeen) all of thew dimmers are operational. The lamps we use work in the currently operational heads, so I've ruled out bad lamps. I've done all checks I know to rule out everything but a bad head. We cant afford to buy new ones and my TD and ATD simply do not have the time to tech me how to fix them. As the head lighting technician for my school I am the one who gets the flack at showtime when they expect everything to be operational. I've exhausted that avenue of help so I've come here as a last ditch effort. The school is demanding a full stage wash setup and we simply do not have enough fixtures to light everything without all the heads being operational. Since all I know about our heads is how to change the bulb and fix the stage pin connectors I am in desperate need of advice. When I find a head with a lamp in it nine times out of ten one of the prongs(?) is charred. They are 2-pin lamps. Does anybody have any advice to what I may do to fix the problem?