Apple Service Diagnostics 3S151 MAC OSX

I have tried every conceivable option for the last couple of days to get either AHT or ASD working. I've tried creating bootable USBs and copying the .diagnostics folder over to the local coreservices folder. I've tried scripts and terminal commands from various sites and absolutely nothing works. I can't boot using a USB or get in by holding down 'D' on boot.

Apple Service Diagnostics 3S151 MAC OSX

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