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Modell A1312 / Mitte 2011 / 2,7 & 3,1 GHz Core i5 oder 3,4 GHz Core i7 Prozessor, ID iMac12,2

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Why is my iMac not booting properly?

My mid 2011 iMac is having trouble booting. It chimes, gets around halfway through the loading bar, then cuts to black screen and begins the process again. Occasionally it will be boot to login screen but as soon as I put my password in and hit enter the computer blacks out and then reboots. I know there is a lot of trouble with graphics cards on this model. Is this a symptom of a bad graphics card?

Update (10/17/2021)

It was the GPU. The T key on boot confirmed it. I tried the oven bake trick with my GPU and it fixed it! Booting cleanly now. Thanks guys!

Beantwortet! Antwort anzeigen Ich habe das gleiche Problem

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Gewählte Lösung

To prove it restart your system and press the T key which puts your system into Target Disk Mode. In this state the Intel CPU graphics engine will be enabled, you’ll see either a FireWire or Thunderbolt Icon on your screen if you do thats telling you the GPU board has failed.

Reference: Mac startup key combinations

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Yeah i think its the GPU

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Trent Creacy wird auf ewig dankbar sein.

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