Mac Mini 2018 model A1993 MLB 820-00939-A - does not boot, shuts down

[2informaticos]

Did you try DFU restore?

 

[Vogelek23]

Unfortunately, I cannot restore BridgeOS as of the very high importance of data. I will now try Target Mode and OS backup onto the external drive.

 

[Vogelek23]

I can confirm that Target Mode did the trick regarding data retrieval, so I can now fully restore the BridgeOS to see if it helps to rectify the main problem.