Im sitting here looking at the motherboard on a Presario V2000 that belongs to my son's friend. The power plug pulled loose from the motherboard and he had it repaired at a shop near where he used to live. They soldered on a pigtail from the motherboard to a generic connector that he plugged the power supply into. Well, there was nothing to hold the pigtail in place but the solder and it pulled out again. I'm reasonably handy enough to re-solder the wires, but I need to get the polarity right. There is no indication which terminal on the motherboard connects to the inner and outer terminals of the power supply. I havent been able to fnd a schematic for the motherboard to give direction. This is for a 20 yr. old kid who cant go out and spend a bundle to fix this. Can anyone help out here?