On a solidbody guitar, electronics problems are usually right under a control plate or pickguard. On a semi-hollow, the problem may be hiding inside the body with no convenient door.
Access changes the job
Pots, switches, caps, jacks, and wiring harnesses often have to come out through an f-hole or pickup route. That means a simple bad jack or scratchy pot can become a careful remove-and-reinstall job.
Why planning matters
If one part of a semi-hollow harness is failing, it may make sense to inspect the whole circuit while it is out. Replacing one noisy pot today and pulling the harness again next month is not ideal.
The repair is part electronics, part patience
Good semi-hollow electronics work needs clean soldering, secure hardware, careful fishing, and respect for the finish. The inside of the guitar is not a place for rushed repairs or mystery knots of wire.