So without the 1060 it is starting normally? I guess you have iGPU on ur CPU to see screen.
If so, put the 1060 out and back again carefully on the pciE slot, the 6-pin in its place, retry...drivers if possible
If it fails to boot again, install latest possible bios for the motherboard.
Also, I'll repeat one of my questions:
What is this PSU? Brand, Model, etc...