Replacing the CRT for_an 233 revA iMac

Discussion in 'Mac Help/Tips' started by webolution7of9, Jul 29, 2002.

  1. webolution7of9 macrumors newbie

    Jul 29, 2002
    Los Angeles
    Does anyone know how to or can tell me how to replace a
    CRT for an iMac, After lots of popping and crackling my tube has
    bit the big one and I need to have it replaced.

    Is this something I can do my self?
    (with out a horrible shocking death?)

    I found a place online to buy them but, I don’t know if I am capable of this project.
    Is it simply R&R? Any help would be greatly appreciated.
  2. ShaolinMiddleFinger macrumors 6502a


    Oct 12, 2001
  3. webolution7of9 thread starter macrumors newbie

    Jul 29, 2002
    Los Angeles
    Replacing the CRT for_an 233 revA iMac

    OK, If I'm not standing in 2" of water?
  4. LethalWolfe macrumors G3


    Jan 11, 2002
    Los Angeles
    If replacing the iMac's CRT is anything like working w/a stand alone CRT I wouldn't try it unless you know exactly what you are doing. I think the "KABOOM" story refers to someone touching a capacitor, not someone standing in 2" of water.

  5. topicolo macrumors 68000


    Jun 4, 2002
    Ottawa, ON
    Heh, that sounds like an interesting idea to investigate. Some guy apparently upgraded his imac to a 17" monitor after using a lot of duct tape :). Sorry, I don't remember the link.
  6. Spock macrumors 68000


    Jan 6, 2002
  7. edesignuk Moderator emeritus


    Mar 25, 2002
    London, England
  8. webolution7of9 thread starter macrumors newbie

    Jul 29, 2002
    Los Angeles
    21" iMac

    Thank you verrrrrrrrry Coooool !!!!!
    I will try this.
  9. Hemingray macrumors 68030


    Jan 9, 2002
    Ha ha haaa!
    I've always known that you shouldn't mess with CRT's, but after doing a little online research, this post just confirmed the seriousness of the dangers you can encounter:

    Welp, good luck. :D Of course, this all may be a moot point if your monitor has bit the dust, but I don't think I'd chance it...
  10. onemoof macrumors member

    Jul 23, 2002
    Minneapolis, Minnesota, USA
    Better option

    Hi, the same thing happened to my iMac Rev A with the monitor dying. It's a rampant problem that has happened to a large majority of iMac Rev A's and even later models.

    Basically instead of trying to replace the monitor in your iMac you should just attach an external monitor. It only takes about 5 minutes to do this.

    Simply remove the plastic bottom from your iMac,
    Disconnect that monitor plug (the one with the two thumbscrews)

    You now have an open monitor port on your computer which uses the old Mac monitor format.

    Connect either an old Mac monitor, or any VGA compatible monitor with a Mac-VGA adapter to the port.

    That's it.

    Right now I'm typing on my iMac Rev A with a 17" monitor I bought on eBay for $110 including shipping.

    Or just buy a new Mac, the Rev A is getting old and I'm updating when the new wave of Power Macs come out next week.
  11. Arcady macrumors 6502


    May 24, 2002
    Lexington, KY
    or sell it to me

    I'll buy tray-loading iMacs (rev A-D) with broken/missing CRT, power supplies and analog boards. I am interested in the logic boards, CD-ROM drives, and CPU cards. Sell your broken down old imac to me!
  12. Dr. Distortion macrumors regular

    May 2, 2002
    Eindhoven, the Netherlands
    I know exactly where the problem lies...

    Well, I've had the same problem with my rev. B iMac, and after a little research I've found that nothing less than the flyback transformer on the analog board is broken. Before the breakdown you see and hear some sizzling noises from the iMac, and you see weird artifacts on the monitor. That's where the internal isolation of the transformer breaks down.

    Now if only someone could find the supplier of these transformers I could repair my iMac. Heck, I could even put a tutorial online with pictures and all how to repair it.

    Just let me know if you know a supplyer for these transformers..

    -Dr. D.

    P.S. yes, I know some stuff about Electro Engineering :)

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