Random power failure even after several attempts to rectify.
After years of working great my Mac Mini 2011 i7 with discreet video is having problems. I went to wake my mini from sleep only to find it was off.
This was odd as I have had it plugged into a UPS since I've had it. It fired up fine but after a little while it just turned off.
Similar experience to holding the power for 4 sec. reset the PRAM. I replaced the power supply. Same results.
I reapplied the thermal paste and it seemed fixed for a day or so but again shut off.
I tried replacing RAM and removing the SSD I had added and still no change.
I think it may be a heat issue but now it shuts off just a couple seconds after booting.
I'm at a loss. Anyone have an idea of something else to try?