Perfect pass problem!

So my friend turned off the perfect pass on the gauage while driving. As soon as he did that the whole boat stoped and I had no throttle. The boat didn't shut off but I couldn't get the throttle to respond. I pulled the hatch and the cable was loose where it goes into the black knob. I tried turning the perfect pass on but it wouldn't turn back on again. Never had a problem before with it so I'm lost to what it could be????