The Ubuntu installer's startup portion is sometimes incompatible with certain graphics cards. Black/purple screen when you try to boot the LiveCD Verify the integrity of the burned CD/DVD or written USB flash drive (this also checks that it's accessible by the computer on which you wish to install).Ģ.Check out these steps to see how to check your CD once you boot into it to make sure it's ready to go.See also: Where to find the checksums of Ubuntu ISO images? or MD5 hash for ubuntu. Ensuring your CD/DVD or USB flash drive burned/written correctly and not damaged: Of course, I had been using a 2011 27” iMac at the same desk for 7 years, so I knew the environment was not the issue.If you are trying to install Ubuntu 1. It needed to be running for 3-4 days before the problem initiated.īTW I was told that the next step was to evaluate my “environment” as there was nothing else they could do. If I let it sit overnight it would operate, but after a few days the problem would start all over again. It would basically drop power while operating, then I could reboot (only by unplugging it) and it would would maybe boot up then drop power again, or drop power during the boot up sequence. It worked fine for about 6 weeks before it started acting up. Regardless, I asked for and received a refund. When I brought it in the third time I was told that they had also replaced the logic board, but I wasn’t informed of this when I picked it up after the second repair. Second fix was to replace the board where the power cable connects. Thank you.Ĭlick to expand.I don’t have the model number but it was a Refurbished 27-inch iMac 4.2GHz quad-core Intel Core i7 with Retina 5K display. Have you ever had similar issue? I would be really glad if you guys could help me out here, the iMac is not under warranty anymore and I cannot imagine buying a new one now since this one was very expensive. Now when I turn the iMac on, I can hear the fan and HDD spinning, but thats about it.
After few more attempts to make the iMac work (resetting SMC, NVRAM, basically anything I could possibly find on the internet), things got suddenly even worse.Īfter one of the reboots, the screen stayed black. I tried going into recovery screen using CMD + R keys but was not able to do so (it seemed to ignore this keybind and went straight to booting into Mac OS X). Both Windows and Mac booting never went through.
I waited for couple of seconds and since nothing was happening, I decided to turn it off and on again.
Suddenly, in the middle of the game (few minutes in), the iMac froze. Hello, I was using my iMac as usual today - did some work in Mac OS X, then booted through bootcamp to Windows and played some PUBG.
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