Radeon HD 6750m Missing After Service

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Level 1

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Radeon HD 6750m Missing After Service

I have a late 2011 model MacBook Pro with Intel HD graphics 3000 and an AMD HD 6750m discrete chip. The logic board was recently replaced by the apple store because of a faulty graphics chip. After I got it back, I noticed (because of an error message in Photoshop) that the Intel graphics is the only display driver that is working. When I click on the Apple logo > About this Mac > Displays, Intel is the only one displayed. I downloaded and installed MachineProfile and that application shows both graphic models in the profile. I updated to Yosemite in hopes it would correct the issue, but it didn't. Can anyone tell me what happened to the AMD chip or drivers? How do I get the AMD chip to work again?

MacBook Pro, OS X Yosemite (10.10.1)

Posted on Nov 29, 2014 3:52 PM

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Answer 1

Loner T

Level 9

59,546 points

Nov 29, 2014 4:06 PM in response to YunkyPunky

There are quite a few issues with this specific GPU. You need to find out if it has been intentionally disabled on the new LB replacement.

Please see problems with amd gpu on early 2011 macbook pro for a long history of problems. There are many similar threads on ASC.

You can also open the MBP and look for it physically - https://www.ifixit.com/Teardown/MacBook+Pro+15-Inch+Unibody+Early+2011+Teardown/ 4990

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Answer 2

YunkyPunky Author

Level 1

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Nov 29, 2014 5:01 PM in response to Loner T

Thanks for the tip! I will follow your advice and see what I can find out. I am thinking the GPU was disabled, which would really suck since that was one of the reasons I wanted this MacBook.

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Answer 3

Loner T

Level 9

59,546 points

Nov 29, 2014 5:48 PM in response to YunkyPunky

You should take it back to where the LB was replaced and ask them to check/fix it.

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