power trim/tilt failure on a Yammy 115/80 jet

Don't think the fact that its a jet matters, but thought I would include it in the info.

Fished out of my buddies 1860 skeeter with a 2002 Yammy 2 stroke 115/80 jet the other day. And he commented that his trim gauge was acting goofy. I didn't think much of it, but when we took the boat out, he tried to trim the motor down at the switch on the motor itself... just clicked. So he tried the switch on the controls... same thing. ?????

Im guessing the solenoid crapped the bed?

I have no experience with this as I don't have power T and T.

Am I thinking right? or could it be something else?

Whats a typical cost for repair for something like this?

Thanks all!

before your buddy spends any money make sure to chase the wires for the trim and verify all the connections are plug in firmly. My old man had the same problem on a mercury optimax it turned out to be a wire was loose under the cowl