[Monobeat]

I opened mine once and enjoyed the process. Leave it unplugged, maybe a grounding strap to boot.......

Keyboard /Modwheel stuff is usually a pretty straightforward thing, like a loose ribboncable, or an unseated connector of some kind. I'd say go for it. You won't hurt anything. Be extremely careful when it's open. The top of the case is very heavy and can fall and damage your plastic keys...

If it's not a loose connector near the mod wheel, then close it up and send it to access for a visit.