PSU, switch, or worse
Got a PC here that the lights on the MOBO come on, when you hit the power button, it clicks like it should, the green light comes on, but when you release the button, it goes back off. Initially I thought this was a PSU problem, but now I'm thinking maybe the power switch itself.
Change the world. Of one person. Today.
If your equation requires either a complex combination of variables to get the desired result OR you can't seem to get the result regardless of the variables....it ain't your variables, it's your constant.