PC turns on for 0.5 seconds and turns back off

dugdan3

Reputable
Oct 26, 2015
9
0
4,510
i just built my pc and i turned it on tried to install windows and it wasnt picking up my hdd so i refitted it using hotswap and went to turn it on and it turned on for 0.5 seconds and turned back off all lights light up fans spin i do not know whats wrong pls help