is you battery charged and it could also be a problem with the transformer or other parts.
Just got a xenon upgrade kit for my car today. anyways i plugged in the kit to try them out (before a formal install) and the bulbs flickered for about 1/2 a second, then went out. I unplugged them, checked all the connections, put in a different bulb (in case mine was bad) turned the lights back on and still the flicker, then nothing. Any help would be greatly appreciated.