Hello Marilyn, welcome to JA/ Pearl, my name is***** and I will try to answer your electrical question today.
Full disclosure I am not a DJ, nor do I have much experience with DJ equipment, but I do have familiarity with electronics so I'll try my best.
My first question is; Do you have the manual for this model, or are you familiar with the operation/ tried appropriate DIP switch configurations ( Obvious question I know, but had to ask it )?
Were you using a DMX controller to send signals to the unit, and is it required to receive signals before the LED's activate? I know that might be a stretch, so as much information that you know or have about the unit would really come in handy when troubleshooting it.