zimerman@phoenix.Princeton.EDU (Jacob Ben-david Zimmerman) (01/05/89)
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!+> <zimerman@phoenix.Princeton.EDU> INTERNET === | <zimerman@PUCC> BITnet
pa1505@sdcc15.ucsd.edu (Barry Brown) (01/05/89)
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!+> <zimerman@phoenix.Princeton.EDU> INTERNET | === | <zimerman@PUCC> 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
stuartb@microsoft.UUCP (Stuart Burden) (01/05/89)
In article <5140@phoenix.Princeton.EDU> zimerman@phoenix.Princeton.EDU (Jacob Ben-david Zimmerman) writes: . Deleted reference to droping Apple Colour Monitor (ouch!)... . | 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. What you are hearing is the standard degauser, built into the Apple monitor (sounds like a VERY loud vibrating thud on mine.. mine has never fallen but it traveled all the way from Australia to the US with me.. and lived to tell the tale :-) ). I remember the first time I ever turned the monitor on, I thought it had blow up!.. scared the.. (well lets not get into that). I think the Apple Colour Monitor has sent more than one sane person diving for the power cord the first time they turn one on.. :-) You may find that the fall did actually jar loose a part within the monitor, and with the standard vibration that the degauser causes, it now sounds much worse (if it's a real rattle, I'd have it checked out by a technician, maybe they can tighten things up inside). | -JBZImmerman! Stu. __Paths to my door:_______________________ microsoft!stuartb@beaver.cs.washington.edu - Usual disclaimer, that all microsoft!stuartb@uw-beaver.arpa - the above is pure fantasy microsoft!stuartb@uunet.UU.NET - and Microsoft only [DE01HB]stuartb@DASNET# {from AppleLink} - gave me the Mountain Dew stuartb@microsoft.uucp {well connected} - to dream it all in a D2012 {@applelink.apple.com - shared acct} - caffeine haze :-) __________________________________________________________________________
land@hpccc.HP.COM (David M. Land) (01/06/89)
This is one of those every-three-months-or-so questions that comes up on the Net. I kind of like them -- like old friends you bump into now and then... What you've done in dropping your monitor is slightly dislodge the internal degaussing coils, and now they're vibrating on power-up. They are energized for a second or so every time you turn on your "cold" monitor. Normally, they're quiet, being bracketed to the CRT mounting bracket, but if they get bumped or whatever, they'll make a distinctive "BWOWMmmm" sound. Not much you can do about it, other than open up the case and see where they're loose. Of course, I have no idea whether or not this violates any kind of anything that may or not make it impossible for you to get it serviced in the future.... Hoping it helps, Dave Disclaimer: The opinions expressed in this posting do not in any way reflect those of Hewlett-Packard Co. or anybody else. Opinion: When the law is unjust, obedience is injustice. Excuse: NO EXCUSE, SIR!
kehr@felix.UUCP (Shirley Kehr) (01/06/89)
In article <5140@phoenix.Princeton.EDU> zimerman@phoenix.Princeton.EDU (Jacob Ben-david Zimmerman) writes: <Recently, my Mac II... <Applecolor RGB monitor... <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. Very Interesting. I'm having a vibration problem with my E Machines Big Picture. It starts all by itself or when someone walks by and jiggles the floor (2nd story, feels like an earthquake all the time). At first I thought it was the weight of the monitor interferring with the disk drives and started moving the monitor. The act of moving it makes the vibration stop, though I may have to do it several times. Is there something about monitors in general that can cause this grating sound? Shirley Kehr