Pins are arranged in two rows. The (1, 3, 5, 7...) is closer to the center of the motherboard, while the even-numbered row (2, 4, 6, 8...) is closer to the motherboard's edge.
Check that you have not accidentally connected a ground wire to a live voltage pin. acer ipisb-vr rev 1.01 front panel
2 - 4 - 6 - 8 - (Pin 10 is missing/keyed) Bottom Row (Odd Numbers): 1 - 3 - 5 - 7 - 9 Exact Pinout Configuration Pin Number Assignment Polarity Requirement Pin 1 HDD LED (+) Hard Drive Activity Light (Positive) Strict — Must match positive wire Pin 3 HDD LED (-) Hard Drive Activity Light (Negative) Strict — Must match negative wire Pin 2 Power LED (+) System Power Indicator Light (Positive) Strict — Must match positive wire Pin 4 Power LED (-) System Power Indicator Light (Negative) Strict — Must match negative wire Pin 6 Power Switch Connected to Case Power Button None — Orientation does not matter Pin 8 Power Switch Connected to Case Power Button None — Orientation does not matter Pin 5 Reset Switch Connected to Case Reset Button None — Orientation does not matter Pin 7 Reset Switch Connected to Case Reset Button None — Orientation does not matter Pin 9 Unused / Key No connection required Step-by-Step Installation Instructions 1. Identify Wire Polarity Pins are arranged in two rows