Here is the front panel pinout for the motherboard (commonly found in Optiplex 390, 790, 3010, 7010 USFF/DT models).
. Because Dell typically uses a single block connector for these connections, rewiring them for a standard aftermarket case requires specific pin mapping Front Panel Header Pinout (11-Pin) dell mih61r mb front panel pinout
To use the MIH61R motherboard in a standard ATX case, the user must bypass the proprietary ribbon cable. Here is the front panel pinout for the
Pin 1 is typically identified by a white triangle marker on the PCB or the squared solder pad on the underside. not used for power/reset.
⚠️ Some Dell Service Manuals show pin 9 = +5V (for diagnostic LEDs / front USB activity), not used for power/reset.