Heyy i was cleaning the inside of the pc and got the Power LED, H.D.D LED and Pwer SW mixed up, now my pc automatic starts as soon as i plug it in but nothing will come on the screen it just has the on botton on.
Take a close look at your mobo...match the letters printed below the pins with the respective connector...connect with the proper polarity (i.e. positive and neagtive)...there wont be any problem even if you by mistake reverse the polarity...check the position of restart and turn-on buttons very carefully...or search the net for your mobo's pin diagram...