Failed GPU bake

Discussion in 'iMac' started by ArmouredBear, Apr 15, 2018.

  1. ArmouredBear macrumors newbie

    Joined:
    Jul 28, 2012
    #1
    I have a 2009 27" iMac with the typical GPU problem, several vertical lines and strange refresh artefacts and can only boot in safe mode.
    Yesterday I tried the oven bake (10 minutes at 200 deg C) and put it all back together, I destroyed the vertical sync connector but apart from that it went ok.
    However, the GPU is now worse, when I boot it chimes then the whole screen is covered in vertical stripes of many colours then after a while it goes white and that's it.
    Trying safe mode makes no difference except the stripes are displayed for longer.

    Is there any point trying the bake again?
    Should I just accept it's death and wait for hprzfully new iMacs at WWDC?

    Thanks in advance for your help.
     
  2. fusionid macrumors member

    Joined:
    Jul 11, 2015
    #2
    Let it go my friend. I would get a used 2015 imac.
     
  3. ArmouredBear thread starter macrumors newbie

    Joined:
    Jul 28, 2012
    #3
    Haha, thanks.
    I was trying to keep it going as long as possible as I also use it as an external monitor for my work laptop PC when working at home.
    I'd really love an up to date Mac Mini with iMac level components tbh.
     
  4. Samuelsan2001 macrumors 604

    Joined:
    Oct 24, 2013
    #4
    There isn’t the cooling nessacary in a Mac mini for iMac components.
     
  5. Guy Clark macrumors 6502a

    Guy Clark

    Joined:
    Nov 28, 2013
    Location:
    London United Kingdom.
    #5
    Baking is only prolonging the life of an already faulty GPU and most of the time if it does work it is only temporary and if you are lucky it will only give you an extra 3 months.
    You could try another bake but if it didn't work the first time it is unlikely you will get different results on the second attempt.
    If the remainder of the iMac is in working order a replacement GPU is likely to set you back around £150 which is within the value of the 2009 27" iMac so although purchasing a new iMac is an option it is worth considering replacing the GPU
    https://www.ifixit.com/Guide/iMac+I...eon+HD+4850+Video+Card+Removal+&+Repair/78771
     
  6. Razzerman macrumors regular

    Joined:
    Sep 11, 2007
    #6
    Unlucky that it didn't work, OP - but worth having a go.

    If you do give up on the imac, you could always sell it for spares/repairs (minus hd). Might get a few quid for it.
     

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