I have recently bought a 10 port USB hub so I can have all of my things plugged into my laptop. But whenever the USB hub is not plugged in to a power source, I get interference between my keyboard (the musical instrument) and my laptop's audio output. When I try to plug the USB hub into power, for some reason, it trips my whole house's electricity.
I can't figure out how to fix this problem and I really want to get it fixed fast so I can get back to making some electronic music.
If it helps, my laptop is a Asus X555LB, and the keyboard I am using is a Casio CTK-4000.