Bootcamp iMac late 2009 ATI HD4850 Black Screen

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Level 1

8 points

Bootcamp iMac late 2009 ATI HD4850 Black Screen

Today i installed on my Mac Windows 10 with Bootcamp but i got some problems.

I runned after the installation the BootCamp Windows Software with compatibility mode and all my drivers work fine but i got several problem with my ATI Mobility Radeon HD4850. After the installation i got black screen, i solved this problem by removing atikmdag.sys from Command Prompt in my Windows 10 Installation Disc, restarted the computer and all work again, but i can't play anygame without graphic drivers.

So i tried to add it manually from Device Manager inside Windows 10, it will install the last drivers, no more black screen but i can't play anygame because i got one errore that my gpu is not recognized.

I tried that in Windows 7 and Windows 8.1 too, but the problem is same.

Anyone know the solution for install without Black Screen the drivers and permit me to play games?

Thanks.

iMac, OS X El Capitan (10.11)

Posted on Oct 22, 2015 5:39 PM

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Answer 1

Shubishake Author

Level 1

8 points

Oct 22, 2015 6:39 PM in response to Loner T

Yes i know that, and i have tried that too.

But the problem that i got is after the installation, i got 0 problem during the installation of any Windows, when i try to install BootCamp software all drivers works except of Graphic Driver, the screen goes black and i can't control the computer, i need to remove anytime atikmdag.sys and atikmpag.sys, when i do that it works.

For example when i remove atikmdag.sys and atikmpag.sys i got this on device manager:

http://i.imgur.com/CFxWoas.jpg?1

And when i Right Click on desktop then Display Setting->Information i got this:

http://i.imgur.com/vXr4vcV.jpg?1

Windows works fine without the drivers of Graphic Card but i can't play to any game because of error that my GPU is not recognized.

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Answer 2

Feb 27, 2016 2:11 AM in response to Shubishake

Hi Shubishake & Loner T,

I have the same problem : Black screen with Windows 10 on my iMac 27inch late 2009.

I try all bootcamps, all drivers from ATI: always black screen.

Have found a solution?

Thank you

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Answer 3

Shubishake Author

Level 1

8 points

Oct 22, 2015 8:09 PM in response to Shubishake

I want let you know that my Graphic Card was damaged 2years ago and Apple Store replace that. Is possible this the problem? I think no because on OSX all my game work.

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Answer 4

Shubishake Author

Level 1

8 points

Oct 22, 2015 7:25 PM in response to Loner T

Ye already downloaded, some files of that don't work with Bootcamp, the 13.1 work but the result are the same: Black Screen.

I remember that many years ago when i buyed this iMac i installed W7 in 2012 for play diablo 3 (for example) and all my drivers works fine. Now after some years i installed W7 (or w8/w10) and got this problem.

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