Tv won't turn on. I was being curious. I put a cable into the service port in back of the

Question

I was being curious.  I put a cable into the service port in back of the tv.  the cord was not plugged in to anything.  As soon as i stuck it inot the vizio the set turned off and won't turn on again.  I can't get the logo on the front to illuminate.  I'm waiting a call back from tech support but it sounds like i'll be waiting for a while.  Any suggestions?