White screen on iMac 2011 27"

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iMac Intel 27" EMC 2429

Model A1312 / Mid 2011 / 2.7 & 3.1 GHz Core i5 or 3.4 GHz Core i7 Processor, ID iMac12,2

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jonasbak @jonasbak

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Posted: Dec 14, 2016

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White screen on iMac 2011 27"

Hello everyone.

I have a big problem.

First of all, i know there are many of these threads about this problem, but i not manage to find a solution for me.

I have a iMac 27" mid 2011. Everything works fine, until i tried to install Bootcamp.

The installation went fine, and i could boot in Windows.

There was some Windows updates i will install, and Windows ask for reboot.

After that reboot, my iMac comes with only a white screen. and nothing else. And altso the chord sound.

I trid reset PRAM, and, COMMAND+S, D, Command+SHIFT+R+P and so on.

Nothing workes.

Is anyone have an idea?

Answered! View the answer I have this problem too

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mayer @mayer

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MacHale Enterprises

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Posted: Dec 14, 2016

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A white screen usually indicated a problem relating to the hard drive. Try starting up holding down the option key and see if you can get to the repair partition. If so, run Disk Utilities.

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I tried that. But it's not working. I worked with this for a long time, and an hour ago i decided to take out the HDD. Unfortinately one of the pins on the display ribbon broke, so i ordered a new one now. I will update later on the week, when i tried a new harddrive.

Dec 14, 2016 by jonasbak

How did it go?

Jan 28, 2017 by Peter Annerback

Sorry my late answer on this topic. As meyer said it was hard drive related. I took out the hard drive and formatted it from another computer. Then I put the hard drive back in and after that I could start my iMac again and install macOS from start

Jan 29, 2017 by jonasbak

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I tried that. But it's not working. I worked with this for a long time, and an hour ago i decided to take out the HDD. Unfortinately one of the pins on the display ribbon broke, so i ordered a new one now. I will update later on the week, when i tried a new harddrive. — jonasbak
Sorry my late answer on this topic. As meyer said it was hard drive related. I took out the hard drive and formatted it from another computer. Then I put the hard drive back in and after that I could start my iMac again and install macOS from start — jonasbak