Hi everyone. First time user here. I just got an SG Muse but noticed there's a noise coming from the guitar that stops when I touch a pickup. This makes me think this is coming from the ground circuit. I remember reading some time ago that this particular model of guitar had such issues, but can't find where I read it or how to actually fix it. How can I figure out how to fix this? I've changed pickups to other guitars before and do own a multimeter (but used it in college and never again, so I forgot how it actually works or what values mean). I checked the control cavity and the ground cable seems to be correctly soldered to the back of a tone control and seems to be securely soldered to the pickup cavity (I haven't actually checked, but just tried to pull it gently to see if it was at least holding to something and it seems it is). The rest of the controls are kind of different to what I've seen before (being push/pull), so I wouldn't even know where to start. How would you fix something like this? Thanks!