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Hi, I have Late 2014 Mac Mini. As soon as it gets power it automatically turns on and fans starts spinning. Black display lights up with no chime and keyboard caps light doesn’t turn on (it means keyboard is not getting power). When I connect my WD External hard drive its light starts blinking. I also tried booting with macos bootable usb but no success. What could be the problem? Any help would be appreciated because there is no official Apple Store in my country. TIA!
It has been awhile I’ve seen a corrupted firmware due to the Clover boot-loader. Do you have access to a second Mac you can connect yours to using Target Disk Mode? Hopefully you can get your mini into TDM using a wired keyboard pressing the T key when your start your system. If not then the damage maybe to much that we can’t recover the systems EFI firmware (BIOS). Reference: Mac startup key combinationUnderstanding the Applications for Target Disk Mode If you can’t get to TDM then you’ll need to either replace the logic board or find someone with the skills and tools to re-burn your systems firmware. Here’s one source for the logic board Late 2014 Mac Mini logic boards and here’s the guide Mac mini Late 2014 Logic Board Replacement
