A few weeks back I posted a question as to regard my Sharp XCV-20e. I was asking about the changes in fan noise and why it was getting louder and then the noise reduced and increased every two minutes. I found that by extending the "screw legs" on the underside, thus lifting the unit off the surface an inch, done the job. Not to much as obviously you get a picture shape like this --> \_____/ but it fixed it anyhow. Just in case anyone else has a similar problem. Thanks, Tony.