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Aporte original por: Loraine Butler ,

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24" 2009 iMac... EUREKA!!!!

This is a long time since the first post but I found your comments really helpful... thank you.

I previously had the HD renewed, a new fan put in etc. put vertical lines persisted. I ended up buying a new one -  from Apple - which I realise now I didn't need to.

After months of fiddling, there is NOTHING wrong with my original Mac. I stripped everything off it and restored to factory settings. I then rebooted (CTRL OPT P R) and (after an overnight reload) hey presto! I'm back to Sierra OS with no lines/distortion. It's been running for 6 hours now and no problems.

It is blatantly an Apple intentional problem or 'fix' just to get us all to ditch our perfectly good Apple products so they can make a bit more money off the faithful! Disgraceful.

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open