My Graffiti Yellow Deluxe Powerhouse developed a loud non-amplified buzz/rattle and I couldn't cure it no matter how many times I rechecked the setup. I know it didn't do this when I bought it used, but maybe after I changed strings? It sounded like it was coming from all along the neck or maybe under the pick guard. I finally noticed I could make it stop if I pressed on the roller type string trees on the headstock. They were screwed tight on the headstock so then I tried a little 3in1 oil on them and my problem was fixed. Can't believe it. Maybe this will help someone else save a lot of time and frustration.