Originally Posted by Tankhobby

If you think the bulb has failed keep in mind it probably can be replaced with a surplus camera flash. There are three wires, one to each end of the tube (that's one and two) and one that should reside or lay on the glass portion of the bulb (three), that is the trigger, It should not touch either end of the glass tube metal parts (something to check). Do not handle when power is on, you may get a real bad OUCH! Power down and wait several minutes.