2015, desktop computer I built randomly powers off during usage, no errors, not the power supply, unsolved to this day.
Possible capacitor fault or a DOA chip -- try checking the components with a cap checker and a multimeter
One more possible solution would be a buggy c-state setting on the motherboard. I have an x570 amd board that would do this until I disabled cstates in bios. It would happen any time, sometimes during movies or when I wasn’t moving the mouse and in a meeting. Not sure if it is fixed yet or not, don’t really feel like toggling it back!
Possible capacitor fault or a DOA chip -- try checking the components with a cap checker and a multimeter
One more possible solution would be a buggy c-state setting on the motherboard. I have an x570 amd board that would do this until I disabled cstates in bios. It would happen any time, sometimes during movies or when I wasn’t moving the mouse and in a meeting. Not sure if it is fixed yet or not, don’t really feel like toggling it back!