2008 octocore shuts down instead of sleeping, then needs to be unplugged to start up

Discussion in 'Mac Pro' started by nano, Jan 25, 2010.

  1. nano macrumors member

    Sep 13, 2006
    This is a new problem, started immediately after moving the computer gently a foot to the left...

    When computer goes to sleep it shuts down.

    Then when I press the power button I hear the mechanical click but it doesn't power back up.

    Then if I unplug and re-plug it'll start back up. Happens every time like this.

    I've, reseated the RAM chips, repaired permissions and reset SDC (SMC? whatever you call it when you hold the power button in for five seconds after unplugging).

    What should I try now?
    All help much appreciated!
  2. milk242 macrumors 6502a

    Jun 28, 2007
    Try reseating anything that can be attached internally, such as hard drives and peripheral cards such as video cards/raid cards/etc... Maybe something is lose and shorting something.
  3. nano thread starter macrumors member

    Sep 13, 2006
    Thanks, I've re-seated everything, but the problem persists.

    What would you suggest next?

    And is continuing to unplug and re-plug it bad?
  4. nano thread starter macrumors member

    Sep 13, 2006
  5. bikeratbrown macrumors newbie

    Apr 20, 2011
    me too!

    i have exact problem....no research or tricks on my side have revealed the underlying issue. continuing to search on my end, hoping someone else identifies the solution!
  6. Another1 macrumors newbie

    Apr 4, 2011
    Got a similar problem month ago. My MP went to sleep (power led was "snoring") but didnt wake up so i have to unplug the power coord at first for a few seconds, later for at least 10 minutes, otherwise i got the explained click and nothing more. I went to an apple store and they repaired it by replacing the Power Supply and the Logic Board.
  7. sochet macrumors regular


    Nov 1, 2006
    I had the same problem on mine too.

    It seems to be fairly common to 2008 mp's. Something apple are aware of but won't public ally acknowledge. In the end mine got set off for repair, which didn't fix the problem, so I got a 2010 one as a free replacement.
  8. Impulse119 macrumors newbie

    Aug 12, 2011
    Dude... what was your secret to getting that done?

    My 2008 Mac Pro has been giving me all kinds of similar hell, except unplugging it doesn't always work... which leads me to taking it to the Apple Store, who tells me they can't help me, so I then take it to a certified service center, pay $150 and all they do is take it apart, and put it back together, and for some reason it starts working. Then a month later... it all comes back.

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