iMac green lines on screen

Joined
Jan 31, 2015
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My iMac messed up a while ago and green lines appeared whenever I started it up. It happend in windows mode too. I can only boot into windows safe mode because I get the blue screen if I don't. I don't know what's wrong because when I was in safe mode the problem fixed itself twice and then I could boot normally. Later it went back to the green lines on the screen. I used the recovery boot option and erased the Mac partition and now can only boot into windows. Any help?

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chscag

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Jan 23, 2008
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Location
Keller, Texas
Your Mac's Specs
2017 27" iMac, 10.5" iPad Pro, iPhone 8, iPhone 11, iPhone 12 Mini, Numerous iPods, Monterey
You didn't provide us with any information regarding your iMac but from the screen shots you posted, it appears the graphics adapter is defective or failing. That usually means an expensive repair.
 

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