Every time I put my (new) iMac to sleep, it reboots?

Discussion in 'iMac' started by blurb23, Aug 21, 2012.

  1. blurb23, Aug 21, 2012
    Last edited: Aug 21, 2012

    blurb23 macrumors 6502a

    Feb 25, 2007
    It's a new 21.5" Late 2011 base model running Lion.

    I didn't start doing this until this afternoon, after I installed additional RAM. I'm assuming this has to be related to it somehow.

    I installed a 2x4GB set (in addition to the standard 2x2) for a total of 12GB in the system. In System Profiler, it's showing the correct amount installed.

    However, whenever I go to put the machine to sleep, it'll 'sleep' for a few moments, then do a full restart (not just wake from sleep). I tried shutting down the machine, and that worked. However, even after a full shutdown, the sleep issue still persists. I tried resetting the PRAM but the problem still exists.
  2. Mac2133 macrumors member

    May 31, 2012
    2x4 = 12? :) maybe that's why its rebooting.... it just can't sleep.
  3. blurb23 thread starter macrumors 6502a

    Feb 25, 2007
    Heh, I put 8 in to go along with the factory installed 4.
  4. cosmicjoke macrumors 6502

    Oct 3, 2011
    Portland, OR
    mix and matching different sticks of ram could be your problem... try just the two sticks you bought... if it continues, try just the stock ram that came w/ the imac etc... you're gonna have to experiment.
  5. John T macrumors 68020

    John T

    Mar 18, 2006
    Do you have an external HD connected (for, say, Time Machine)?

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