System:
AMD 2700X
Gigabyte B450-M (F5 bios)
Nvidia 980 GTX
Creative AE-5
Corsair AX1200 (original one)
32GB RAM (4*8 corsair 3200mhz vengeance)
So my PC worked fine in my Corsair 350D case, it has only started doing this since porting to my Phantek Evolv-X
Again symptom is - turn PC off via standard shutdown, when I attempt to power back on there's a click - but no action. I have to then unplug/switch the PSU off briefly - then wait a moment to power back on.