HELP,confused and upset

So I have a problem I can't figure,I'll start from the beginning.I have an Erevo with Medusa2000,Quark 80,CC bec running 4s.Last night my steering locked up and got no response.So I checked it out and the servos quit on me.So I started looking for a reason and found the wires were frayed on the bec under there cover right at the board.So I fixed the wires ,tested it with a cheap servo and it worked fine,put in a new servo,tried it out and boom there went another servo.So i pull the receiver and stick it in another vehicle everything works fine.So I use another CC bec,test it with my cheap servo,everythings fine. I put another good servo in,get ready to drive it and when I plugged everything in,poof another servo bites the dust.Now I'm out 4 servos ,about 200 bucks worth,and am very confused. Could it be in my esc? I have the red wire unhooked,but it seems that every time it has failed has been with the esc hooked up.But the drive side seems to be working fine.I'm at the verge of pulling everything and getting a really big hammer.