Tc Helicon Perform VK

New

Bought this and worked like a champ. All of a sudden my mic didn't work any longer. Removed the VK unit and mic worked fine. When I play the keys & sing in mic, the set button lights up as if it is getting signal. 
I have midi cable connected to keys. Mic in the mic in. And 1/5" left/right out to combined 1/4" cable to sound board. 
Like I said it worked great for a while and now it just stopped sending a signal out. I saw JJ it has a 3year warranty. I bought unit April 6 2020. 
let me know what I need to do. Being unit is still under warranty.