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One time out of ten I get a gray screen on boot-up

377 Views 6 Replies Latest reply: Sep 20, 2009 10:46 AM by donv (The Ghost) RSS
Cindy Level 2 Level 2 (240 points)
Currently Being Moderated
Sep 15, 2009 4:39 PM
Everything seems to run just fine since I installed SL except once in a while I get a gray screen on boot-up. I have to turn off power and re-boot and it so far has always booted up when I do that.

Anyone know what might be causing my problem?
Mac Pro 2.66 5gb ram, Mac OS X (10.6.1)
  • Carolyn Samit Level 10 Level 10 (84,160 points)
    Currently Being Moderated
    Sep 15, 2009 8:03 PM (in response to Cindy)
    Hi Cindy,

    Try resetting the SMC.

    To reset the SMC on a Mac Pro:

    From the Apple menu, choose Shut Down (or if the computer is not responding, hold the power button until it turns off).
    Unplug all cables from the computer, including the power cord and any display cables.
    Wait at least fifteen seconds.
    Plug the power cord back in, making sure the power button is not being pressed at the time. Then reconnect your keyboard and mouse to the computer.
    Press the power button to start up your computer.
    Another way to reset the SMC on a Mac Pro computer is:

    From the Apple menu, choose Shut Down (or if the computer is not responding, hold the power button until it turns off).
    Open and remove the metallic outer door.
    Press the SMC_RST switch that is located slightly below and to the right of the row of diagnostic LEDs. Use a non-metallic, non-conductive object, such as a wooden pencil. Note: Mac Pro (Early 2008) does not have an SMC_RST switch, refer to the reset procedure steps in the previous section.
    Replace the metallic outer door.
    Press the power button to start up your computer.

    From here: http://support.apple.com/kb/HT1806


    Carolyn
    Intel iMac 2.66, Mac OS X (10.6), iPhone 3GS PBookG4 iBookG4 Intuos Tablet Epson Olympus Airport iPods JBL
  • donv (The Ghost) Level 5 Level 5 (4,600 points)
    Currently Being Moderated
    Sep 20, 2009 10:46 AM (in response to Cindy)
    You might try installing SL over SL. Some "little thing" might get fixed in the process. No guarantees. And, of course have a plan for getting back to where you started just in case. Personally, I'd have a bootable clone of my internal drive on an external drive.
    15" 4 GB 2.8 GHz 500 GB MacBook Pro with LaCie 1TB external 7200 RPM RAID 0, Mac OS X (10.6), PowerBook 540c; iBook G4; 2 Dell Laps; 1 HP Lap; Mega Gateway FX Desk

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