Another iMac G5 problem

Discussion in 'Macintosh Computers' started by edesignuk, Oct 23, 2004.

  1. Moderator emeritus

    edesignuk

    Joined:
    Mar 25, 2002
    Location:
    London, England
    #1
    So it's not enough I had to replace the midplane, now the screen keeps dimming after a bit, as though it's saving power (which it isn't set to do anywhere that I can find?), if I move the mouse the brightness comes back up and all is normal...for a few seconds, then it goes back down in brightness again (actually it's darker at the top than at the bottom at this point, like a gradient). Now it just stays like it and other than rebooting there is nothing I can do to get it back to normal. What gives?

    It wasn't doing this before the midplane was replaced, but by the same token since the midplane was replaced it has been fine too (replaced it a few days back), it is only today it has started doing this.

    Yup, I've zapped the PRAM :rolleyes:

    I will call Apple about it on Monday, but I thought I'd ask just incase anyone had any ideas :)

    Thanks.
     
  2. macrumors 68020

    MacinDoc

    Joined:
    Mar 22, 2004
    Location:
    The Great White North
    #2
    When my iMac's display is turned up to the maximum brightness, it will dim after not being used for several minutes, but it returns to the normal brightness as soon as I use the keyboard or mouse. It may be a feature designed to save energy or prolong screen life. I don't know why yours would stay dimmed, though...
     
  3. macrumors member

    Joined:
    Sep 16, 2004
    Location:
    UK
    #3
    Mine has suddenly started doing that in the last couple of days too - but is usually right after the machine starts up. :confused: :confused:

    Also, fans seem to have got really bad on mine - and having trouble even starting it up now , everything freezes when it finally gets into OS X *ater waiting on the local disks laoding bit of startup for ages)

    Uusally fixes itself if I put it into sleep mode and awaken it (but sometimes crashes when trying to put it into sleep mode) and is eaxactly the same as with yours, darker at the top than at the bottom.

    Will probably be calling apple next week too!
     
  4. thread starter Moderator emeritus

    edesignuk

    Joined:
    Mar 25, 2002
    Location:
    London, England
    #4
    Exactly the same here, this isn't good. But at the same time at least it's not just me! :) But this is reeeeealy ticking me off, if I don't use it for a few minutes, I have to then sleep it and wake it again just to get the screen back to normal, what a joke! This is the 2nd major problem within 10 days of taking delivery :mad:
     
  5. Moderator emeritus

    WinterMute

    Joined:
    Jan 19, 2003
    Location:
    London, England
    #5
    I know you know this, but 1st gen hardware is not always a good investment from Apple, my 17" powerbook needed a new logic board, new screen and video card, new power management... essentially they gave me a new machine in the same case!!

    Does the G5 iMac have dynamic screen dimming like the PowerBook? i.e. does the screen get dimmer as the light goes? Also does the keyboard have a backlight? The PowerBook screen fluctuates sometimes, especially in sunshine, this is controlled by the light sensor for the backlit keys, I wonder if the iMac has a similar system, the controls are on the mouse and Keyboard control section.
     
  6. thread starter Moderator emeritus

    edesignuk

    Joined:
    Mar 25, 2002
    Location:
    London, England
    #6
    I know, it serves me right for being seduced by it doesn't it :(
    As far as I know, no, it doesn't.

    I just got a helpful PM from a member called daggle (thanks again!) who pointed me to this thread over at another forum. I'll give the suggestions there a go and report back.
     
  7. macrumors member

    Joined:
    May 29, 2004
    #7
    Well the screen dimming thing seems to be normal (all macs I've used do it)..

    But the non-undimming thing is a bit odd.

    My iBook has occasionally done that when I've let the screen saver activate (folding@home) and then the display has gone to sleep.

    After 'waking' the display up and deactivating the screensaver, sometimes the screen remains dark and won't reactivate despite moving the mouse.

    I can sometimes solve the problem by pressing F11 (exposé) or by hitting my hot corner to activate the screen saver again, and then moving the mouse to immediatly deactivate it.

    But as I said, I've only has this happen a few times...
     
  8. thread starter Moderator emeritus

    edesignuk

    Joined:
    Mar 25, 2002
    Location:
    London, England
    #8
    Well, everything seems OK now after doing the following:

    • Zap PRAM
    • Repair Permissions
    • Repair Disk
    Very weird indeed, I thought the PRAM would have been the most likely thing (that's what I tried in the first place), but it looks like the good old repair permissions & disk repair fixed this one, freaky :confused:
     
  9. thread starter Moderator emeritus

    edesignuk

    Joined:
    Mar 25, 2002
    Location:
    London, England
  10. Moderator emeritus

    Joined:
    Jul 4, 2004
    #10

    You're not having the best of luck with this machine, are you? (she says, stating the bleeding obvious...)

    Is this a dreaded Rev A issue, do you think? Or just a one-off? Do you think they might replace the whole machine if you press them hard enough?

    There seem to be a few people around having probs with their new iMacs and I was about to strongly recommend a friend of mine purchase one with part of her student loan (graphics student)...
     
  11. thread starter Moderator emeritus

    edesignuk

    Joined:
    Mar 25, 2002
    Location:
    London, England
    #11
    oh great, this is just f***ing perfect! Now it's got the gradient fade from darker to not quite so dark (but still darker than it bloody well should be!) all the time. For **** sake! ARGH! :mad: :mad: :mad:
     
  12. macrumors Penryn

    rdowns

    Joined:
    Jul 11, 2003
    #12
    Given your original problem and others who solved it with a new power supply, my guess would be that.

    I'm feeling real lucky that I've had no problems with mine to date.
     
  13. thread starter Moderator emeritus

    edesignuk

    Joined:
    Mar 25, 2002
    Location:
    London, England
    #13
    This thing is b0rked, I made my last comment after rebooting and it was like the problem I had described in the first place immediately, but now sleeping it an waking it up again has brought it back to normal, WTF!? :confused: :mad:
     
  14. macrumors regular

    Joined:
    Apr 30, 2004
    Location:
    Bradford, UK
    #14
    Sound like time for a call to apple customer service...

    If I were the both of you and you had tried all the usual repairs to the OS etc, then would be calling apple and very politely demanding a new machine. That especially goes for you edesign as you have already had a major problem with it, I have heard on several occasions if you are firm but fair with them and tell the how dissapointed with the product and that you would be reluctant to buy apple again they will swap out your machine without too many moans.

    A student of mine has just had their 2.0Gig dual processor G5 swapped out for a 2.5 gig machine because or recurring problems with it (the 2gig one he bought original was the highest spec machine available at the time)

    It's a right royal pain in the arse but I would do it if I were you both. Good luck with the calls.
     
  15. thread starter Moderator emeritus

    edesignuk

    Joined:
    Mar 25, 2002
    Location:
    London, England
    #15
    - Miner Willy

    I would love to, but I know they haven't got any to replace it with (unless they have a secret stash for just such an occasion?).
     
  16. thread starter Moderator emeritus

    edesignuk

    Joined:
    Mar 25, 2002
    Location:
    London, England
    #16
    OK, gets weirder...it only seems to happen when I have the screen set to sleep (go blank) after a specified amount of time. But, instead of going to sleep (blank), it just fades a bit, its after this that it then goes to a gradient fade :confused:
     
  17. macrumors 68020

    AmigoMac

    Joined:
    Aug 5, 2003
    Location:
    l'Allemagne
    #17
    my iMac G5 order was on the way but got cancelled, after a family meeting (Wife) ;) , the iMac will come home with next rev.
     
  18. macrumors 603

    Mechcozmo

    Joined:
    Jul 17, 2004
    #18
    At this point, chuck it at a white van man. Film it and post it. ;)

    Your iMac is b0rked. But I have an idea...what is the other display connected to it looking like? Does that have the problem or is it only the internal one? When you get rid of the screen-span hack?

    And if all else fails, an iMac that weighs ~25 lbs traveling at ~14 mph would do quite a bit of damage to a white van... :)
     
  19. macrumors 68000

    Sharewaredemon

    Joined:
    May 31, 2004
    Location:
    Pitch forking mulch in Nova Scotia, Canada
    #19
    hey edesign, maybe if you put that 400 gb harddrive in the iMac that will fix it.

    Also, did you try archive installing?
    Again after you did that do fix the last problem?
     
  20. macrumors member

    Joined:
    Sep 16, 2004
    Location:
    UK
    #20
    Tried the steps mentioned above now and still no joy - still doing it.

    Guess it will be a call to apple tomorrow! :(
     
  21. thread starter Moderator emeritus

    edesignuk

    Joined:
    Mar 25, 2002
    Location:
    London, England
    #21
    Yeah, I'll be calling 'em too, be sure to come back and tell us what they said, I will do :)
     
  22. macrumors 604

    ravenvii

    Joined:
    Mar 17, 2004
    Location:
    Melenkurion Skyweir
    #22
    You got it stock, right? So why not return it, and call it a lesson learned?
     
  23. thread starter Moderator emeritus

    edesignuk

    Joined:
    Mar 25, 2002
    Location:
    London, England
    #23
    Because I want an iMac, and I know I'll have to wait for weeks for a replacement. I'll see how things go when I speak to them. Also I did not order from Apple direct.
     
  24. macrumors 68000

    Phat_Pat

    Joined:
    May 8, 2004
    Location:
    I Live Where I Live
    #24
    if its something they can repair it won't take to long...

    i had to send my Gateway Profile 4 back because the screen keep turning off for no reason or wouldn't turn on on a start up and it only took them like 3 or 4 days to fix it and send it back. i would call them what do you have to lose? i mean they arn't going to steal your iMac and never give it back..... :rolleyes:
     
  25. macrumors 65816

    yoda13

    Joined:
    Sep 26, 2003
    Location:
    Texas
    #25
    We hope not anyway ;) There is another thread on here about a guy who has lost his computer when he shipped to AppleCare. No one can find it.
     

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