If you need further help troubleshooting this vintage system, please share you are using or if you are also trying to map out the adjacent front-panel USB and audio headers .
The header usually consists of 9 pins in a 2x5 configuration (with one missing pin for orientation). According to technical documentation for similar Foxconn layouts: Hard Drive LED (HDD LED): Foxconn N15235 Front Panel Connectors - Google
Upper Row: [ Pin 2: Power LED + ] [ Pin 4: Power LED - ] [ Pin 6: Power SW ] [ Pin 8: Power SW ] [Empty] ----------------------------------------------------------------------------------------------- Lower Row: [ Pin 1: HDD LED + ] [ Pin 3: HDD LED - ] [ Pin 5: Reset SW ] [ Pin 7: Reset SW ] [ Pin 9: NC ] Use code with caution. Pin Assignment Breakdown Pin Number Wire Connection Label Polarity Sensitivity Hard Drive LED Positive HDD LED + or IDE LED + Yes (Must be Positive) Pin 3 Hard Drive LED Negative HDD LED - or IDE LED - Yes (Must be Ground) Pin 2 Power LED Positive PLED + or PWR LED + Yes (Must be Positive) Pin 4 Power LED Negative PLED - or PWR LED - Yes (Must be Ground) Pin 5 Reset Switch RESET SW or RST No (Omnidirectional) Pin 7 Reset Switch Ground RESET SW or GND No (Omnidirectional) Pin 6 Power Switch POWER SW or PW_SW No (Omnidirectional) Pin 8 Power Switch Ground POWER SW or GND No (Omnidirectional) Pin 9 No Connection / Dummy Leave Empty Pin 10 Missing Pin (Key) No pin on motherboard Step-by-Step Connector Installation If you need further help troubleshooting this vintage
: Located on Pins 6 and 8 . This is the most critical connection; touching these two pins with a screwdriver can boot the system without a case. Polarity does not matter. Pin Assignment Breakdown Pin Number Wire Connection Label
Unplug all front panel cables except for the POWER SW and see if the loop stops. Audio and USB Front Panel Headers