'''++Rusty Jones++'''
this could be caused by a bad lamp or a bad inverter. You do want to go ahead and check the lamp first. [https://www.youtube.com/watch?v=Oxpr2g1vthg|This video] should help with that.
If that does not work let us know so we can try and get further into the wiring/power supply/inverter etc. Post some good images of your power supply/inverter with your question so that we can see what you see. Use this guide [guide|21499] for that