Random Shutdowns. Unplug - Replug to start up

Hi there.

My 27” iMac 5K (A1419) has just started shutting down randomly. I did a terminal test and it looks like an SMC issue. Issue numbers all 0.

I reset the SMC to no avail.

Everything points to power supply failure but is there anything else I can check or reset before I replace it?


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Restart your system and press the D ket to enter into diagnostics, see if it popped an error and let us know.

Reference: Mac startup key combinations


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