Hi
I need some help from you guys. I have iMac 2011 27" (emc 2429) and graphics card is not fully functional anymore. It gives up if there is graphics stress. I went to official mac repair and they said that graphics card is the problem. But it was very expensive to replace there so I decided to give a try myself. I am pretty familiar with replacing parts on iMacs. Story continues so that I bought 2Gb graphics card with same chip (6970m) as my old card. But when I insert new card screen is completely black. I have reseted NVRAM. If I replace new card with my old faulty one it works (short time before stress). Dealer is sure (and tested) that new card is not faulty.
Any ideas could there be some driver issue or anything like that? Even if screen is black computer turns on normally. If I press volume up/down buttons volume is adjusted.
Thanks if you have time to help...
I need some help from you guys. I have iMac 2011 27" (emc 2429) and graphics card is not fully functional anymore. It gives up if there is graphics stress. I went to official mac repair and they said that graphics card is the problem. But it was very expensive to replace there so I decided to give a try myself. I am pretty familiar with replacing parts on iMacs. Story continues so that I bought 2Gb graphics card with same chip (6970m) as my old card. But when I insert new card screen is completely black. I have reseted NVRAM. If I replace new card with my old faulty one it works (short time before stress). Dealer is sure (and tested) that new card is not faulty.
Any ideas could there be some driver issue or anything like that? Even if screen is black computer turns on normally. If I press volume up/down buttons volume is adjusted.
Thanks if you have time to help...