Based on community verification for this specific motherboard family, the pinout is typically arranged in two rows: 3 5 Power Switch 6 Power Switch 2 Power LED + 4 Power LED - 7 Key (Empty/Missing) 8 Power Sw Ground/Loop 9 10 Power Sw Ground/Loop Key Connection Details
(often using a jumper) can sometimes trick the board into thinking the original Dell proprietary module is connected. Other Headers USB 2.0 Header: dell mih61r mb front panel pinout
Unlike the power switch, LEDs are polarity-sensitive. If your HDD or Power LED doesn't light up, simply flip the connector on the pins. Reverse the polarity on pins 1 and 3
Reverse the polarity on pins 1 and 3. LEDs are diodes; they only work when current flows the correct way. If it doesn't light one way, flip the connector. flip the connector.