distorted lines freeze on boot

Discussion in 'Mac Pro' started by ninjawt, Feb 22, 2011.

  1. ninjawt macrumors newbie

    Joined:
    Sep 14, 2007
    #1
    I have an 2006 macpro, nvidia 8800gt, yesterday my mac froze during diagnostics by onyx, there were green and pink wavy lines on screen, i did a hard shut down then trying rebooting, but immediately i see green vertical distorted lines and the boot doesn't get past by the apple logo. it freezes and have to shut it down.
    i've tried:
    resetting pram, smc
    removing half the ram and then the other half
    installed a new hdd, didn't really matter the same
    i even removed all hdd, the same
    can't start from os x dvd drive, freezes,
    the same for safe mode
    it does enter verbose mode, still the same lines, but i can't read all the commands, it's like it's half towards the left and other half is at the far right, but only the first letter of the commands, it's like i have a second screen.

    http://i54.tinypic.com/2q0ixar.jpg

    now 2 weeks ago, i had a similar problem but my mac didn't even boot.
    i replaced my graphics card and it worked fine, but just for a week, then again the same wavy lines during mac os x environment

    any ideas?
    I'm desperate
     
  2. JediMeister macrumors 68040

    Joined:
    Oct 9, 2008
    #2
    Sorry to say, the only thing that all the steps you've taken wouldn't fix is a busted logic board. You already know it's not software, which a new HD/new OS would have fixed. If not memory/video card, you're running out of hardware components to isolate to.
     
  3. goMac macrumors 603

    Joined:
    Apr 15, 2004
    #3
    Your GPU is dead. Common issue with the 8800. Likely the replacement is also dead. The replacements are not fixed cards.
     

Share This Page