iMac PowerPC (Rev B) turns itself off

Discussion in 'iMac' started by MrSmith, Oct 30, 2006.

  1. MrSmith macrumors 68040

    MrSmith

    Joined:
    Nov 27, 2003
    #1
    I've got a Rev B iMac PowerPC (16 months old) and today it's started turning itself off. It's done it 4 times now. Any ideas or pointers to known problems?
     
  2. Queso macrumors G4

    Joined:
    Mar 4, 2006
    #2
    Some of the Rev Bs had problems with capacitors on the logic board bulging, which caused exactly this behaviour. Fix is a logic board swapout. Do you have Applecare on the Mac?
     
  3. dcv macrumors G3

    Joined:
    May 24, 2005
    #3
    The bulging capacitors thing was a Rev A issue... but the Rev Bs seem to also suffer logic board and/or power supply issues. Mine's had 2 replacement power supplies and one logic board replacement so far... and yes, the turning itself off problem was the first symptom. Backup now while you still can.
     
  4. aquajet macrumors 68020

    Joined:
    Feb 12, 2005
    Location:
    VA
    #4
    You might try doing this. Hopefully that'll solve the issue.

    There is a repair extention program for the faulty capacitor problem but it only covers the Rev. A machines. So if it's a hardware issue MrSmith, hopefully you purchased AppleCare. Otherwise, you might need to fork over some cash.
     
  5. MrSmith thread starter macrumors 68040

    MrSmith

    Joined:
    Nov 27, 2003
    #5
    Thanks a lot guys. I appreciate your help. I've done the procedure in aquajet's link so I'll see how it goes (incidentally, I've had the fans racing as well). But no, no AppleCare. Any idea what kind of amount we're talking? Lower would be better for her-that-holds-the-purse-strings :(
     
  6. eyedoc_00 macrumors regular

    Joined:
    Jun 25, 2005
    #6
    I have the rev b iMac maybe a couple of months older than yours. It started to shut down as well. I took it in to an apple store for repair. They are going to run some tests and they ordered a new power supply and logic board to have the parts when they determine what the problem may be. The mac genuis thinks it is the power supply. I also have them looking into why the fan races all the time.
     
  7. jorasho macrumors regular

    Joined:
    May 10, 2005
    #7
    Looks at the Apple Discussions boards. There's a huge thread about it. There are numerous reports of people who bought their Rev B iMac, mostly around May 2005.

    As of this moment, Apple is still not recognizing this problem, however I'm afarid sometime they will hav to do so because they are making fun of theirselves not recognizing the issue.

    (I had this problem also with my iMac Rev B, it was repaired by replacing the power supply, the old one feeled very hot, my AASP told to me)
     
  8. eyedoc_00 macrumors regular

    Joined:
    Jun 25, 2005
    #8
    Update!

    I just got my iMac back last night.
    I had the logic board, power supply and LCD screen replaced. All seems well for now. Keeping my fingers crossed that everything is OK.
     
  9. MrSmith thread starter macrumors 68040

    MrSmith

    Joined:
    Nov 27, 2003
    #9
    I hope so after that expense! Keep us up to date.

    I reset my SMU per the instructions at aquajet's link. I did it once and it made no difference. The machine turned off 4 times during the day. So I did it again yesterday morning and the computer didn't sleep or the screen sleep all day! I have the computer and display set to sleep after 15 minutes in the Energy Saver panel. I'll see what happens today. I only know it's turning off because I leave it on all day and use 'connect to server' from work. At some time during the day I get a 'disconnected' message.
     
  10. eyedoc_00 macrumors regular

    Joined:
    Jun 25, 2005
    #10
    I have applecare so it did not cost a penny. They told me it would have been $1,600 if not for applecare. At that price, I would have to get a new computer.

    I tired resetting the SMU and it did not do anything. If you have applecare, I would take it in right away.
     
  11. MrSmith thread starter macrumors 68040

    MrSmith

    Joined:
    Nov 27, 2003
    #11
    I do not. I am therefore sitting here with my legs tightly crossed...
     
  12. eyedoc_00 macrumors regular

    Joined:
    Jun 25, 2005
    #12
    I got my fingers crossed for you. Hope all turns out well.

    My luck with computers has never been good. Therefore, I allways buy an extended warranty. I could go no for hours about my last computer, Gateway. Took 9 months to get them to replace my computer that was under warranty. That is why I purchased a mac. I needed a computer and wanted an all-in-one design. My Gateway all-in-one was finally replaced with a tower system.
     
  13. MrSmith thread starter macrumors 68040

    MrSmith

    Joined:
    Nov 27, 2003
    #13
    I, on the other hand, had my G3 PowerMac for six years and it ran perfectly until it was stolen last year. I, therefore, assumed I was lucky with them. :( Third time lucky, I suppose: Applecare from the next one.
     
  14. jorasho macrumors regular

    Joined:
    May 10, 2005
  15. sevenrd macrumors newbie

    Joined:
    Nov 3, 2006
    #15
    Excellent. Thank you for that.

    Just today my Rev. B iMac, purchased in May 2005, started shutting down spontaneously. Checked the number: EMC 2056.

    First post, after much lurking and never having a problem with Apple products. Glad to see they've acknowledged this. Great forum as well.
     
  16. dcv macrumors G3

    Joined:
    May 24, 2005
    #16
    It's about time they finally acknowledged this problem.

    I can't find the EMC number on my iMac. It's not listed on the serial number label on the underside of the stand :confused:
     
  17. jorasho macrumors regular

    Joined:
    May 10, 2005
    #17
    That's strange. I think an AASP can see if it's covered otherwise.
     
  18. eyedoc_00 macrumors regular

    Joined:
    Jun 25, 2005
    #18
    Great News!

    As I stated above, I got mine fixed under my applecare, but for those who were out of warranty and thought that they coud do nothing this is great news.
    When did apple come out with this repair extension?
    Hopefully MrSmith sees this and can take advantage of this repair extension!
     
  19. dcv macrumors G3

    Joined:
    May 24, 2005
    #19
    I found this support doc - it seems ALL 20" Rev B iMac G5s have the EMC number 2056 so in other words ALL 20" Rev B iMacs should be covered by this programme. I thought the wording on the Repair Extension programme page was a little ambiguous.
     
  20. MrSmith thread starter macrumors 68040

    MrSmith

    Joined:
    Nov 27, 2003
    #20
    I'm still here! Thanks for the information guys. My machine has reached the unplugged stage. Lucky I have two machines or I'd never have seen that linked article.
     
  21. jorasho macrumors regular

    Joined:
    May 10, 2005
    #21
    It's a November 2006 program, so it is definitely not running for more than 3 days, or so.
     

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