Another device = like a lamp or a radio.
And this is the connector I mean:http://imageshack.us/photo/my-images/204/connectedzm9.jpg/
do you have it set up as specified in the mainboard's manual? And if you do, try to unplug it again and bridge the two pins with a screwdriver to switch the computer on
... carefully please. You can't harm your computer by touching the adjacent pins, but you do not want
to slip and smash your screwdriver on the PCB.