Have refurbished Nexlink computer 3425 series with DH61CR motherboard need to replace front panel how do I tell the power pin from the ground pin no + or - on motherboard or. plugs from front panel no marking on plugs of any kind. Have tried motherboard manual online shows which color power plug, reset sw plug, H.D.D. LED plug goes to, but not which of the two pins for each plug is power or ground . Each of the plugs have two wires , each plug first wire on each plug is a different color, the second wire on each plug is white . Could white be a ground wire . Any help would be appreciated.