Good day all, I'm looking for some help with an iMac (11,1) that froze up and then rebooted and now when booting I get a status bare and just before the login screen the screen becomes distorted. I have an extended display that the distortion appears there as well. I tried reinstalling the OS, Sierra with no help. Also tried the AHT with a quick test and the longer test. There were no faults on either test. Images below are some of the issues. Any help would be greatly appreciated. Thanks.
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