Okay, at 14, i was pretty stupid for trying to overclock my very old computer, but i knew many people my age with near powerhouses, and i was getting sick of mine. So, i press my power button, and everything seems to activate as normal, but my monitor stays blank. i suspect that i damaged the power supply, but i cant do advanced things, and i cant let my parents find out its broken, so, please, just clear and easy solutions. Thanks so much 
