How can Geniuses tell if 8600M gt is defective?

Discussion in 'MacBook Pro' started by thadoggfather, Jan 16, 2009.

  1. thadoggfather macrumors 604

    thadoggfather

    Joined:
    Oct 1, 2007
    #1
    Just wondering, mine seems to be on its way out (blank screen after yanking the ac has happened a few times recently, got the LED columns thing once after yanking AC, and had some blasted contrast flashes that would last a minute when i first got the laptop) its an early 2008.
     
  2. MidwestStuck macrumors member

    Joined:
    Jan 14, 2009
    Location:
    Estados Unidos
    #2
    They have a device they connect to your MBP via USB from which they run several tests. It takes about 10 minutes to run them all. Hope you figure out what's up with your computer.
     
  3. thadoggfather thread starter macrumors 604

    thadoggfather

    Joined:
    Oct 1, 2007
  4. palebluedot macrumors 6502a

    palebluedot

    Joined:
    Jun 29, 2008
    #4
    I just got my GPU replaced yesterday even though I had none of the overt problems with the 8600 under then bad FPS. I ran a self system test off the OS X cd and it gave me a video controller error - so I took it to an Apple Store.

    The "Genuis" ran a test off an external hard drive as said above and within 2 minutes of running the test it popped up a big "FAILED" dialogue box. I don't think the test even finished. So if your worried just take it in and run the test. I'm not sure what it's testing - maybe the ability to fill the entire buffer of the GPU, test the RAM, etc.

    (Edit) It seems like a general hard ware diagnostics test with a standard graphics test. In the beginning of the test it flooded the screens with colors and shapes so that may have been the stress test part.
     
  5. thadoggfather thread starter macrumors 604

    thadoggfather

    Joined:
    Oct 1, 2007
    #5
    so they ran the test off the hard drive, says passed on every test. I guess my 8600M gt isn't defective for now.
     

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