Display Issue

Discussion in 'iMac' started by throoney, Feb 28, 2015.

  1. throoney macrumors newbie

    Joined:
    Feb 28, 2015
    #1
    I currently have an early 2008 iMac (intel 2.66 ghz, 4 gig ram). I was planning on upgrading my HD with an SSD to speed up the performance of the computer. While I was backing up my old hard drive, the screen started to show floating dots, and artifacts all over the screen. I thought the HD was failing, and went forward with the new drive. Once the new drive was installed, I had the same issue, and in addition, I could not install the OS. I put the old HD back, and currently am restoring the OS, as per the discussion i had with the Apple tech. During the re-install, I am still having lines and dots (picture below). I am thinking it is the display or the video card. Would anyone have any thoughts? Given the age of the computer, I wouldn't fix it, unless it is something I can do myself cheaply. Thank you for any help you provide.
     

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  2. redheeler macrumors 603

    redheeler

    Joined:
    Oct 17, 2014
  3. throoney thread starter macrumors newbie

    Joined:
    Feb 28, 2015
    #3
    the computer won't boot either. Could that be caused by the gpu?
     
  4. redheeler macrumors 603

    redheeler

    Joined:
    Oct 17, 2014
    #4
    Yes, it can be, although that dosen't rule out a bad hard drive or data cable. What phase of the boot does it get stuck at?
     
  5. throoney thread starter macrumors newbie

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    Feb 28, 2015
  6. throoney thread starter macrumors newbie

    Joined:
    Feb 28, 2015
    #6
    I just checked the LED indicator lights, and all 4 are on. Not sure if that is helpful.
     
  7. MacVidCards Suspended

    Joined:
    Nov 17, 2008
    Location:
    Hollywood, CA
    #7
    Bad GPU.

    If you have one of the iMacs with removable one, a 10 min trip through the oven may fix.

    There are also reflow services.

    Or get a replacement. Has to be a Mac one that came in your machine as original or option.

    If the GPU is soldered to logic board, it will need a whole new one.

    Sort of like a $2,000 car that needs an $1,800 transmission.
     
  8. throoney thread starter macrumors newbie

    Joined:
    Feb 28, 2015
    #8
    Thank you so much for your help. I tried the oven fix and it worked. Mac is up and running. Now the question is do I still try the ssd upgrade or pass on it since it's days are numbered.

    Great forum. Thank you again for you help.
     
  9. redheeler macrumors 603

    redheeler

    Joined:
    Oct 17, 2014
    #9
    It's only a matter of time before the issues appear again. Your iMac is almost 7 years old anyway, it may be time to start looking for a replacement.
     

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