7 Replies Latest reply: Apr 16, 2007 4:38 PM by Rod Hagen
laurie.warren Level 1 Level 1 (0 points)
Hi all,

Well, we have the ever-popular, iMac G5 that won't power up issue. No sound, no video, the light turns on. The one-year warranty expired on 2/17/07 and it's not in the first generation iMacs covered by Apple's extended repair for this issue.

We are interested in diagnosing in more detail but are having a hecka time getting the back cover off. Funny how the user's manual simply states: raise the foot and lift the back cover off. Sure.

Anyway, anyone have some back cover removal tips or tricks? We've got some old credit cards we can ruin but aren't having much luck with those either.


20" iMac G5, Mac OS X (10.4.9)
  • MGW Level 7 Level 7 (27,020 points)
    Welcome to Discussions - There are screws on the bottom of the case, they are captive. There are instructions HERE, they are for a 17", but I don't think that matters.

    Sometimes the screws are difficult to remove, keep turning gently but firmly, and try not to strip them

    Please post back with results,

  • laurie.warren Level 1 Level 1 (0 points)
    Hi Miriam,

    Yeah, I've removed the screws and even had the front cover off (which requires removing the screws to the memory access door also) but that doesn't reveal the motherboard and the diagnostic LEDs.

    I've been using the support manuals and simply am totally stuck at the "Holding the back cover by the metal stand, tilt the cover up and lift it off the computer." Not happening.

  • MGW Level 7 Level 7 (27,020 points)
    You have, I think, an iSight, and Apple says there are no user serviceable parts, so perhaps the back only comes off with special tools? In fact, now that I think about it, I think only the front comes off, that's the way to open it. I don't know if this will be helpful, but here are some pictures of a disassembled iSight. http://www.kodawarisan.com/imacg5_isight/imacg501i.html


    P.S., if you'd like, go ahead and click the "Helpful" or "Solved" buttons on any of the posts / replies above if you feel they were helpful or adequately answered your question.
  • Baby Boomer (USofA) Level 9 Level 9 (57,015 points)
    "Funny how the user's manual simply states: raise the foot and lift the back cover off."
    Please advise which model G5 iMac you are trying to remove the back cover?
    http://docs.info.apple.com/article.html?artnum=301724-en How to identify your iMac
    http://docs.info.apple.com/article.html?path=Mac/10.4/en/mh355.html Getting information about your computer

    Your system info confirms you have an iSight G5 iMac. I have that model also & no where in my manual are there instructions on the removal of its back cover.
  • laurie.warren Level 1 Level 1 (0 points)
    Right you are. The link to the photos here:


    confirmed for me that I was on the right track earlier when I removed the front cover. When I started peeling off all the black tape I got intimidated and backed out of it trying to get the back cover instead.

    With the front cover off and all the tape peeled back, I was able to take out the four screws holding the LCD in place and then lift out the LCD. Viola' access to the hard disk and, if I can find them, the four diagnostic LEDs on the logic board. Please tell me they have the diagnostic LEDs on this system?

    Thanks all.
  • Rod Hagen Level 7 Level 7 (31,985 points)
    Hi Laurie,

    As you have discovered you have a different iMac to the one described in the kb item with LED lights and the like.

    Yours is not readily user serviceable, but what have you done before trying to take it apart?

    The first things to try in a situation like yours are to

    1) disconnect all peripherals except Apple mouse and keyboard

    2) Zap the PRAM (with the computer completely shut down hold down the command option p r keys. Start up the computer. Wait for the chimes to sound three times)

    3) reset the SMU - see http://docs.info.apple.com/article.html?artnum=301733

    If you haven't alrady done so, try them now.


  • Rod Hagen Level 7 Level 7 (31,985 points)
    My advice, laurie, would be to stop right now and put it all back together.

    The iSight model iMac G5 is completely different internally to the ones with the LED's for diagnostic purposes and the suggestions contained in the article you have been referring to about such things simply don't apply.

    You may, in fact, have already accidentally "solved" your problem, as the steps you have so far taken will actually have reset the computers SMU because of the prolonged withdrawal of power.