mac mini mid 2011 not power on

Discussion in 'Mac mini' started by skyway, Dec 5, 2014.

  1. skyway macrumors newbie

    Joined:
    Oct 25, 2014
    #1
    Hello. I came back again :) About 25min ago stop working my mac mini mid 2011. Not power on try reset not help. Maybe same one have logic board repair manual? Or know where can by problem? Thank you for help ;)
     
  2. rigormortis macrumors 68000

    rigormortis

    Joined:
    Jun 11, 2009
    #2
    i think all you can do is
    check to make sure its plugged in
    make sure you AC power is good
    unplug power card and all connectors
    hold down power button for 5-15 seconds to clear the capacitors (apple calls this clearing the SMC controller)
    plug in power cord
    turn on

    if that doesn't work its either the power supply or the logic board
     
  3. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #3
    The proper process for resetting the SMC is as follows:

    Intel-based Macs: Resetting the System Management Controller (SMC)
     
  4. rigormortis macrumors 68000

    rigormortis

    Joined:
    Jun 11, 2009
    #4
    holding down the power button clears the capacitors faster then what apple says. it saves 13 seconds! is even waiting 5 seconds after you connect even necessary??

    i swear one time apple said to simultaneously connect power and hold the power button


    i think they changed the directions to make them easier to understand

    you know what i found out that is pretty bizarre???? this only works 50 % of the time, but if i put my mac mini 2014 haswell to sleep , i can totally unplug it from the wall and walk around with it for up to like what seemed like 30 to 45 seconds before it shuts down.

    it just flashes its light like its asleep.

    and its not hibernating

    as far as i can figure out it takes a while to build up enough energy in those caps. if you do this too soon after your last attempt the mac shuts down hard


    i found this out because my APC BACK UPS, failed and dropped its load . and i got up off the couch to see what happened, and i saw the led light flashing and it blew me away, and it was like almost half a minute until i decided to get off the couch
     
  5. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #5
    I'll trust Apple's instructions, rather than someone random person in a forum. Apple manufactured the products, so they know best how to operate and maintain them.
     
  6. rigormortis macrumors 68000

    rigormortis

    Joined:
    Jun 11, 2009
    #6
    back in 2011, which this when this mac was made. they said press and hold for 5 seconds with no power
    and then insert power cord
    and just turn on

    apple changes their directions. but its all the same thing


    i could of really posted something really bad and told him to boot into open firmware, haha

    its obvious with the haswell mac minis you need to go back to holding down that power button or waiting long then 15 seconds


    i think ill submit feedback
     
  7. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #7
    That's not true. Those are instructions for resetting the SMC on an Apple notebook with a removable battery. The OP has a Mac mini, which requires a different procedure for resetting the SMC. The procedure has not changed since 2011.
    Again, not true. For the Mac mini, you don't hold down the power button at all.
     
  8. skyway thread starter macrumors newbie

    Joined:
    Oct 25, 2014
    #8
    hi again smc reset not help. power adapter voltage 11.80v. So its dead logic board?
     
  9. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #9
    It's looking that way. Take it to Apple. They should be able to diagnose the problem and give you a repair estimate.
     
  10. skyway thread starter macrumors newbie

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    Oct 25, 2014
  11. rigormortis macrumors 68000

    rigormortis

    Joined:
    Jun 11, 2009
    #11
    sorry to hear about your mac.

    ---


    holding down the power button with no power or unplugging and waiting 15 seconds is the same thing. they both drain the capacitors in the power supply and gives the logic board a cold start, ensuring the contents of ram are totally empty


    this is what can happen to you if you just wait 15 seconds like apple says or hold down the power button with the unit unplugged

    Teen electrocuted while working on unplugged computer

    this person died because he did not hold the power button with his computer unplugged.

    http://www.cnet.com/news/teen-electrocuted-while-working-on-unplugged-computer/


    how to reset the smc circla 2010
    Reset SMC of an iMac, Mac Pro, Mac Mini:
    * Shut down your Mac
    * Disconnect the power cord
    * Press and hold the Mac’s power button for 5 seconds
    * Release the button
    * Reattach the power cables and boot the Mac as usual

    http://osxdaily.com/2010/03/24/when-and-how-to-reset-your-mac-system-management-controller-smc/

    go complain to OS X daily. then some random guy in a forum



    update on "sleeping mac experiment"
    my first attempt of seeing how long my sleeping mac could stay alive failed. and the mac mini dropped power.

    the only thing changed was i am no longer using hdmi and i am using mini display port to VGA adapter. test need to be repeated several more times.
    maybe hdmi cable is supplying power for mac???


    heres another cool flash back from 1982
    ====
    they were so worried about teenagers getting shocked and killed by capacitors that they actually made a FBT (Fly Back Transformer) episode of Quincy, ME

    quincy was this big tv show where jack plugman used to stand on a soapbox about orphan drugs, and dui laws, etc.

    this was season 8, episode 5, unreasonable doubt.

    SPOILER ALERT
    the kid was working on a television set. he followed apple's advice of simply unplugging his TV set and waiting 15 seconds before repairing his tv set. the Fly Back Transformer ended up electrocuting a baby.

    if he would of unplugged the tv set and held the power button on for 15 seconds , the baby would of lived.
     
  12. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #12
    While I realize you may have good intentions, you’re not helping by posting misinformation, then derailing the discussion and potentially causing confusion by arguing that your misinformation is better advice than what Apple recommends. If you really want to help, get your facts straight before posting. Searching the Apple support site is a good place to start, and it's a more reliable source of information than a forum post or a news site.
     
  13. skyway thread starter macrumors newbie

    Joined:
    Oct 25, 2014
    #13
    any reset not help no power. so i try found problem without board schematic :)
     
  14. skyway thread starter macrumors newbie

    Joined:
    Oct 25, 2014
    #14
    fan full speed

    hello. So my mac mini power on now but next problem. Press power button light on, no sound nothing on screen end fan full speed. Same one can help?
     
  15. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #15
    Try resetting the SMC.
     
  16. skyway thread starter macrumors newbie

    Joined:
    Oct 25, 2014
    #16
    not help still fan full speed

    ----------

    disconnect power cord, wait 5 s, connect power cord fan start full speed
     
  17. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #17
    Did you check your temps to make sure they're not high enough to justify the fan speed? Also check Activity monitor to see what might be consuming CPU. If that doesn't help, it may be a faulty sensor. It's beginning to sound like there's no software solution, but rather that you have some hardware problems. I'd take it to Apple for them to diagnose the problem and give you a quote for repair.
     
  18. skyway thread starter macrumors newbie

    Joined:
    Oct 25, 2014
    #18
    computer is no boot. if you press power button just start fan full speed, no beep sound screen is black

    ----------

    with sensor fault?
     
  19. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #19
    You definitely have a hardware problem. I wouldn't attempt to diagnose it remotely. I recommend you take it to Apple.
     
  20. skyway thread starter macrumors newbie

    Joined:
    Oct 25, 2014
    #20
    hi again. found problem mac mini now power on boot. Problem fan still full speed end one ram slot not working, how fixed ram slot ?
     
  21. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #21
    The most likely problem is your RAM isn't properly seated. Try removing and replacing the module, making sure it's fully seated. Also, try swapping the RAM modules, to make sure it isn't a problem with a module itself.

    If you're not already doing so, use iStat Pro (free) or iStat Menus ($16) to get accurate readings of fan speed and temps, among many other things. A forum member has posted a copy of iStat Pro that has been "tweaked" to enhance compatibility with Mountain Lion. You can download it here.

    Then post a screen shot of your temps and fan speed.
     

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