Supportix
Level 1 (0 points)

Q: Graphic processor is dead

Hello


Is there any possibility to choose the decided graphic processor as default device and deactivate the ATI graphic card in a iMac (mid 2007, ATI radeon HD 2600 pro 256 ram).

What I do at the moment is booting in safe mode to reach this. But on this way, no speaker and micro and camera (in Skype) is working. But in facetime the camera works well (strange, isn't ?)

Thanks in advance for any help!

iMac, OS X Yosemite (10.10.1), iMac late 2007 / 4 GB ram

Posted on Jan 21, 2015 12:59 PM

Close
Supportix

Q: Graphic processor is dead

  • All replies
  • Helpful answers

  • by brenden dv,Helpful

    brenden dv brenden dv Jan 22, 2015 2:38 PM in response to Supportix
    Community Specialists
    Jan 22, 2015 2:38 PM in response to Supportix

    Hi Supportix,

     

    I apologize, I'm a bit unclear on the exact nature of the question you are asking. If you are referring to discreet vs. integrated graphics processors, you may find the following article useful, though you should note that the Mid-2007 iMacs do not have integrated or dual GPUs:

     

    About integrated video on Intel-based Macs - Apple Support

    iMac (Mid 2007) - Technical Specifications

     

    Regards,

    - Brenden

  • by Supportix,

    Supportix Supportix Jan 24, 2015 2:27 PM in response to brenden dv
    Level 1 (0 points)
    Jan 24, 2015 2:27 PM in response to brenden dv

    Hi Brenden,


    Many thanks for replaying my request. As I see on the links You sent to me, my iMac doesn't have a integrated and a discrete graphic card. Only a discrete graphic card is present, if I understand right. But, I think, I have to tell You the whole "story" about my difficulties.


    One day, starting my iMac, it hangs after doing the start sound and showing the Apple logo and 1/3 of the progress bar. After about 3 minutes, the mouse pointer appears (movable) at the left upper edge in the gray screen. --- And thats it. No further reaction for hours.


    I found, if I start in safe boot mode, I get the login window as before. Just the screen flickers a bit and scrolls 3 times itself. After this, I can log in and work nearly as before. Some restrictions I have now in this mode. The speakers, the micro and the camera (in Skype) don't work. Facetime and TeamViewer brings up the camera as before (strange, isn't?)


    Prior to this issue, I had a bootcamp partition with Win 8.1 on it. Since the system was hanging, the win partition was grayed out. So I couldn't choose it to start with. Then I decided to erase the whole HDD and did a clean install with Yosemite.


    Thereafter, an expert from the support community said, the graphic processor might be defective. I had to send him a system check dump, generated by a UNIX script, he gave me. (see my former post : Yosemite 10.10.1 will not boot regularly)


    Now, my idea is, to reactivate the units which disabled the safe boot mode, I suppose. I don't know, if I'm right with my idea. But, this way I could work with my iMac nearly normal. Maybe, there are other reasons for the faulty functionality on my iMac, who knows?


    Many thanks for Your help in advance!

    Regards,

    Supportix





  • by Loner T,Helpful

    Loner T Loner T Jan 24, 2015 3:25 PM in response to Supportix
    Level 7 (24,601 points)
    Safari
    Jan 24, 2015 3:25 PM in response to Supportix

    It is likely that your GPU is failing or failed, or its connection to the logic board has been compromised. Please see https://www.ifixit.com/Guide/iMac+Intel+20-Inch+EMC+2133+and+2210+Video+Card+Rep lacement/1014 for reference. You can replace the Video card, but it requires delicate and painstaking work.

  • by Supportix,

    Supportix Supportix Jan 25, 2015 9:33 AM in response to Loner T
    Level 1 (0 points)
    Jan 25, 2015 9:33 AM in response to Loner T

    Hi Loner


    Many thanks for Your info and the informative link! But, to replace an unit in my iMac would be the ultimo ratio to me. So, I will use it like it is at this moment, or, maybe, I receive another idea to resolve my "problems".

    Sorry for that and thanks a lot!


    Regards,

    Supportix