erm on my hiper i repaired (just the fan, not the power circuit), 14=blue, 15=black and 16=green, which from the manual is: -12V, COM (0V /GND i'm thinking), and PS_ON#. Its 24-pin too.
which would mean in this case, you short 15 & 16?
i managed to get it to get in standby mode, but couldn't get it to power on. the fans just "blipped" and nothing else, there is another connection called PWR_ON, but i never got round to testing as i was only on my lunch break!
i can't remember which pins i shorted( most likely PS_ON# and COM, but don't quote me) but i made sure, by reading the pin outs in the manual, and checking what voltage was on the pins with a multimeter , that i wasn't shorting a supply rail.