Row 1 (Edge): 1=HDD+, 3=HDD-, 5=GND, 7=Reset+, 9=Reset- Row 2 (Inner): 2=PWR+, 4=PWR-, 6=NC, 8=PWR_LED+, 10=PWR_LED-
Mark grabbed his multimeter. He needed to be sure. He set it to continuity mode. He touched the black probe to a known ground on the chassis and the red probe to the pins he suspected were ground. dell mih61r mb front panel pinout