Please help me. iMac 27 5k late 2014 emc 2806 i5 3.5Ghz made a clover bootloader with USB, after which the monitor did not respond anymore but OS (High Sierra 10.13.6) started it via a mini displayport with an external monitor and full fan power. I made Efi Dump with Raspberry pi that looks very suspicious, so I decided that the Efi chip would be copied with (imac 2014 retina 5k first read DONE.bin) Dump file from your site. After that the iMac has not started yet, the LEDs for diagnosing the light are only the first two lights, while the 3 and 4 are not displayed. By returning the original dump, the iMac still does not start, only the fan rotates at normal speed.
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