Hm...Can you take a chance to run Q-Fan setup in bios (Monitor TAB,Qfan configuration->Qfan tuning) and see if they will start to spin at all?
Try also set them in DC mode.Some people report that in PWN mode fan do not spin,but in DC mode does.
I think we must do wodoo.
Try these steps.
1.Reseat CPU-don’t know,maybe somehow it will help.
2.Take some another PSU to test.
Maybe it will help [emoji106]