Path: utzoo!utgpu!watmath!clyde!att!osu-cis!killer!ames!ucsd!sdcc6!sdcc19!sdcc15!pa1505 From: pa1505@sdcc15.ucsd.edu (Barry Brown) Newsgroups: comp.sys.mac Subject: Re: Monitor Noise... Keywords: Help! Monitor vibration damage Message-ID: <833@sdcc15.ucsd.edu> Date: 5 Jan 89 09:00:59 GMT References: <5140@phoenix.Princeton.EDU> Sender: pa1505@sdcc15.ucsd.edu Reply-To: pa1505@sdcc15.UUCP (Barry Brown) Organization: University of California, San Diego Lines: 36 In article <5140@phoenix.Princeton.EDU> zimerman@phoenix.Princeton.EDU (Jacob Ben-david Zimmerman) writes: |Hi net! I have a somewhat nasty problem. Recently, my Mac II |Applecolor RGB monitor was being moved out of storage, and due to |circumstances we need not go into, it got dropped and suffered a shock. |It was in its high-impact polystyrene neato Apple official packaging, |and suffered no VISIBLE damage, and the picture is fine. However, it |has developed a nasty trait: When it is powered up after being 'cold' |(i.e. off for more than two-three minutes or so) it produces a LOUD |vibration, which drowns out the usual Mac II chord and sounds as if a |moving part is involved. I know of no moving parts in the monitor, at |least none that might produce this, but does anyone out there have any |ideas? I don't know how to escribe the noise better; it lasts from |between a half second to a second, almost like a wheel that was scraping |hard against a surface was coming up to speed. Excpet that it is |definately a vibration. Ah well. As usual and of course, thank you very |much for any information y'all might have. | -JBZImmerman! | |-- |___________ | "If there's anything around here more important | || | than my ego, I want it caught and shot now."-ZB ||| ||acob Zimmerman!+> INTERNET | === | BITnet Sounds to me like that's the degaussing coil in the monitor working. It removes any residual magnetism in the monitor when you power it up. It's completely normal for it to be louder than the startup chord you normally hear. Try this: power up the montior and let it warm up. After about five minutes, press the degaussing button on the back of the monitor (I believe it's the only other button besides the power button. Check the manual). If it makes the same sound, then the sound you hear at power-up is definitely the deguassing coil and you shouldn't worry about it. Barry Brown pa1505@sdcc15.ucsd.edu