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Released on October 23, 2012. Core i5 or Core i7 Processor. Apple Fusion Drive.

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mac mini 2012 late : thunderbolt video problems

I have a MacMini Late 2012. Model MacMini6,1. with the last version of operating system Catalina 10.15.4. I Have been taking the image to the monitor through a MiniDisplayPort to DisplayPort cable, to a DELL 2711U brand monitor without problems. It has been a couple of weeks that the signal is not output on the screen, the monitor says that there is no signal input source. I've tried various cables too, and it only outputs video signal through HDMI. I have tried to make a diagnosis by starting by holding down the D key, but I get the error on the screen "Error 0x800000000000003, Cannot Load 'EFI / Drivers / TestSupport.efi'". I have tried to do with a USB stick, a diagnostic system without success. Someone could help me out. Thank you.

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Apple messed up the systems firmware breaking the onboard diagnostics, you could try the internet server version of diagnostics with Option (⌥) and D keys. I don’t think you really need to go down that path as the diagnostics only go so far.

Let’s try checking a few things:

Reset the PRAM & SMC How and when to reset your Mac’s PRAM and SMC

Let’s also see if your system running the lates EFI Firmware for it Apple Firmware Update for Mac Mini (Late 2012)

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