If you click reply, there is a button in the “composer” window that is titled “upload.” Hopefully that’s not broken for you.
I would go through the entire signal chain first, cable by cable and fx as well. One by one, until you can exactly introduce where the noise is coming from. At least that way you can eliminate the possibility of faulty cables and jacks. After that… It’s power supply check up.
Try this thread… it may have some helpful information.