It's easy to find the on pins, just use a knife or paper-clip and go down the row (each side, don't go across the pins) and when it turns on you have found the right pins. Next reset, do the same thing with the computer on and when it re-boots you've found the reset pins. For the leds you will need a multimeter from radio shack or frys, etc. With the computer running and the multimeter set to DC higher than 12v find the 2 pins that have continuous power. This is your power led. Next run defrag and find the 2 pins that have intermittent power. Those are the hdd led.