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  1. #1
    Gray Screen on bootup - 2005 iMac

    Member Since
    May 26, 2012
    Posts
    2
    Gray Screen on bootup - 2005 iMac
    I'm a new member here and I'm hopping that someone will be able to help me with my iMac. It's a late 2005 G5 iMac and whenever I try and bootup my machine I get the dreaded gray screen with a folder with a flashing question mark on it. I have done my fair share of pc repairs, but I'm still a bit of a novice when it comes to mac repairs.

    I have tried to perform a Safe Boot and reset the NVRAM / PRAM without any success. My first thought was that something had gone wrong with the hard drive. So I inserted the Mac OS X cd-rom and proceeded to go to the disk utility in hopes that I could perform a archive and Install or simply reformat the drive. To my surprise my hard drive was not listed in disk utility. At that point I figured the hard drive was dead. I went out and purchased a new 500Gb SATAII 3.5 drive. After I installed the new drive in the iMac I booted up the machine from the cd-rom and I was amazed to find that the new hard drive wasn't listed in disk utility either.. Now that I know it's not the hard drive I'm stuck wondering what else it may be.. Any help would be greatly appreciated.

  2. #2
    Gray Screen on bootup - 2005 iMac
    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    20,014
    Specs:
    iMac i5 2.7GHz, 16GB memory, OS 10.10.5
    G'day and welcome to the forums.

    Tell us about the system discs. Did they come with the computer? Are they silver/'grey or what? Also your PowerPC iMac is SATA and SATA II may not be recognised. On some drives it is necessary to use jumpers to 'throttle' back the speed of the drive.
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

  3. #3
    Gray Screen on bootup - 2005 iMac

    Member Since
    Dec 11, 2010
    Posts
    1,351
    Quote Originally Posted by undergrad View Post
    I have done my fair share of pc repairs, but I'm still a bit of a novice when it comes to mac repairs.
    ... a computer is a computer - change your thinking to see the similarities.

    Now that I know it's not the hard drive I'm stuck wondering what else it may be.. Any help would be greatly appreciated.
    A problem with the HD cable would give those symptoms - just one possibility.

  4. #4
    Gray Screen on bootup - 2005 iMac

    Member Since
    May 26, 2012
    Posts
    2
    Quote Originally Posted by gsahli View Post
    ... a computer is a computer - change your thinking to see the similarities.


    A problem with the HD cable would give those symptoms - just one possibility.
    Thanks for the suggestion, I will have to give that a shot. I imagine that I'm able to connect any standard SATA cable to test it out?

    Quote Originally Posted by harryb2448 View Post
    G'day and welcome to the forums.

    Tell us about the system discs. Did they come with the computer? Are they silver/'grey or what? Also your PowerPC iMac is SATA and SATA II may not be recognised. On some drives it is necessary to use jumpers to 'throttle' back the speed of the drive.
    You have a good point..I have two gray install disks which came with the machine. I will have to see if I have a old SATA I hard drive laying around anywhere at home I can try on the machine.

    I will give these suggestions a try and let you guys know how I made out.
    Thanks guys!

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