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Why won't my Mac Pro startup?

11737 Views 7 Replies Latest reply: Oct 22, 2012 10:59 AM by Grant Bennet-Alder RSS
-djbolt- Level 1 Level 1 (15 points)
Currently Being Moderated
Oct 19, 2012 10:46 AM

All the information I have:

 

I've been out of town for a week, so I unplugged my Mac Pro for the time I was gone.

I got back this morning and plugged it in.  It started normally.

Updates were available.  I installed them which required a restart.  I restarted.

Now the Mac Pro will not come back on.  It seems to alternate between just not responding (alhtough it seems the insides are starting up nothing comes on the screen) or sometimes it chimes and comes up with grey boot screen then goes to black.

 

Please help!  I have tried to reset SMC controller by turning off, unplugging the power for 15+ seconds, plugging back in the power, waiting 5+ seconds and hitting the power button and then it chimes, brings up grey boot screen, then the screen goes black.

  • The hatter Level 9 Level 9 (58,535 points)
    Currently Being Moderated
    Oct 19, 2012 10:55 AM (in response to -djbolt-)

    A Never be w/o a bootable backup  clone of your system

    B Clone your system with CCC before updates

    C Pull all your drives and devices and cables and try

    D Invest in a 900W / 1500VA UPS

    E NO IDEA what OS you are on: 10.6 .7 or .8

    F Install a new fresh OS and initialize a drive for emergency / clone that to a new base OS system

    G SMC Reset: Hit the power button for 10 seconds. By your method your Mac WAS reset while unplugged for week

     

    Troubleshooting: My computer won't turn on

    https://support.apple.com/kb/TS1367


    Symptoms

    If your Macintosh computer won't turn on, here's how to troubleshoot it. Please keep in mind that although your computer may display similar symptoms that prevent it from showing video, this article discusses what to do if the computer won't turn on, meaning that when you press the power button:

    • You don't hear a startup chime.
    • You don't hear any fan or drive noise.
    • The power button or power indicator doesn't light up at all.
      If your computer doesn't display any video, it may display one or more of these similar symptoms when you press the power button: 
    • You may hear a startup chime.
    • You may hear fan or drive noise.
    • You may see the power button or power indicator light up.
      If any of these conditions occurs, see Troubleshooting: My computer has no video instead.

    Resolution

    If your computer won't turn on, try each of these steps:

    1. Make sure that the power cord is plugged into a working wall outlet, and that it's properly connected to the power adapter. (To check if the wall socket is working, plug in a lamp or other electrical device.)
    2. Make sure that the power adapter is properly connected to the power port on the side or back of the computer.
    3. Disconnect all accessories that are plugged into the computer, such as a printer, hub, or other mobile device.
    4. Reset the computer's PMU, SMC, or PRAM. Refer to the instructions for your model:
       

    reset SMC For "Mac wont' turn on or boot" and related

    https://support.apple.com/kb/TS1367


    General purpose Mac troubleshooting guide: Isolating issues in Mac OS X

    Creating a temporary user to isolate user-specific problems: Isolating an issue by using another user account

    Identifying resource hogs and other tips: Using Activity Monitor to read System Memory and determine how much RAM is being used

    Starting the computer in "safe mode": Mac OS X: What is Safe Boot, Safe Mode?

    To identify potential hardware problems: Apple Hardware Test

    General Mac maintenance: Tips to keep your Mac in top form

     

    Recovery Mode

  • Grant Bennet-Alder Level 8 Level 8 (48,095 points)
    Currently Being Moderated
    Oct 19, 2012 3:28 PM (in response to -djbolt-)

    the power button on the front of the Mac Pro is flashing

    That is a clear indication of a RAM memory problem. The MacPro 65lb tower uses Error Correcting Code (ECC) memory and has the Hardware on the XEON chip to do memory correction on the fly.

     

    Finding memory problems with ECC memory is very different from non-ECC memory problem isolation.

     

    Use the running system with its error detection to your advantage. Check frequently in:

     

    About this Mac > ( More Info ) >  Memory ...

     

    ... for any modules at less than their expected size, or status other than "OK". These have failed.

     

    Also check:

     

    About this Mac > ( More Info ) >  Diagnostics ...

     

    ... to see if there are recent reports of failures.

    Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers
  • The hatter Level 9 Level 9 (58,535 points)
    Currently Being Moderated
    Oct 22, 2012 10:15 AM (in response to -djbolt-)

    Cloning is a quick test fix, do it and see.

     

    The long version is zero out, full clean reinstall

     

    And try to rule out peripherals, one by one.

     

    Also be sure to create a new test user on test system, or move aside temporarily your

     

    ~/Library

  • Grant Bennet-Alder Level 8 Level 8 (48,095 points)
    Currently Being Moderated
    Oct 22, 2012 10:59 AM (in response to -djbolt-)

    are any memory modules showing up at less than their known size (typically half) ?

    Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers

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