my computer wont turn off .

[Ultimate]

i am running XP.
i was fiddling around with the wires because i was bored... i guess thats why this is happening. silly me. also the lights on the front of my computer arnt working (the power on lights, flashes when loading). after i "fiddled" they dont work either.
i am thinking maybe i should smash it to pieces? unless anyone has an answer... (i just cant LIVE without lights/ability to switch computer off).
thanks anyway