Hi trias10, I'm replying here to your comment on Prema website. You already know that my friends and me are experiencing the same issue with the W230ST too. While I find it logical to be a hardware issue related to loose bolts, I find it quite strange that, being it clearly notiiciable when the fan is barely spinning, it doesn't creak like hell when it's working at full speed. At full speed, I can't hear nothing unusual, when I think the issue consequences should be worse. If you find out something new, please let us know.
