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Introduction |
| [video|https://youtu.be/v1DXBLkiqFM]Late 2009 iMac 27" Video Card Repair — ATI Radeon HD 4850[/video] | | This video guide (see "Video Instructions" below) shows how to disassemble the iMac in order to remove and repair the video card, then reassemble and test. As shown in the video, it is highly recommended toI recommend that you label all connectors to make them easier to reconnect without error. I also suggest you watch the video guide on YouTube so you can read important information I added under the video there in its text description -- open the video on YouTube, look beneath the video and click on "SHOW MORE" to see all the notes.
The basic procedure shown in my video has been successfully performed by others on 2010, 2011 and 2012 iMacs.
I also made a SECOND VIDEO showing my second bake, which provides even more useful information such as the thermal paste I successfully used and how to apply it: https://youtu.be/6BJGLFCigdA |
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Conclusion |
| Not for the faint of heart and recommended only for someone who has a full day free and isn't afraid to tinker. Since the 2009 iMac is out of warranty and non-functional with a problematic video card, there isn't much to lose by attempting a video card repair. And while I cannot guarantee the "oven bake" method will work in every case, it did work in mine and in the case of many other people whose stories I have read online. Indeed those stories were inspiration for me to attempt the same repair. Even if one does not wish to repair the video card, this video still shows how to remove the logic board and video card and put them back in place. Be sure to watch the video on YouTube so you can read the Text Description under the video which contains important information. Within that Text Description, I post a link to a second video I made on this topic, which I recommend you watch before getting started. And don't forget to bake at 200°C (400°F), noting the difference between Celsius and Fahrenheit. |
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