You have three options, ranging from "quick and dirty" to "professional."
Based on reverse engineering of the MIH61R circuit traces (located near the board's edge, typically adjacent to the SATA ports), the pinout is as follows.
Note: Pin 1 is typically identified by a white triangle marker on the PCB or the squared solder pad on the underside. dell mih61r mb front panel pinout
| Pin Number | Function | Wire Color (Typical Dell Loom) | Description | | :--- | :--- | :--- | :--- | | Pin 1 | PWR_LED (+) | Blue (+) / White (-) | Power LED Anode (+3.3V/5V) | | Pin 2 | GND | Black | Ground (Common for LED) | | Pin 3 | PWR_SW | Grey | Power Switch Input | | Pin 4 | GND | Black | Ground (Common for Switch) | | Pin 5 | RST_SW | Orange | Reset Switch Input |
Table 1: Primary Front Panel Pinout Configuration You have three options, ranging from "quick and
Auxiliary Header (HDD LED): Often, the Hard Drive Activity LED is separated from the main cluster on this board to accommodate the ribbon cable design. It is often located on a 2-pin header labeled simply "HDD" or integrated into the main bundle if using the full OEM harness.
If you are reading this, chances are you are staring at a green Dell motherboard pulled from an OptiPlex 390, 790, 3010, or 7010. The model number stamped on the board is MIH61R (often paired with a CN-0Y2MRG or similar tag). You have a standard PC case sitting next to it, and you are holding a handful of tiny two-pin connectors labeled Power SW, HDD LED, and Reset SW. 💡 This audio pinout is not HD Audio
The problem? Dell doesn’t play by the rules. They use a proprietary front panel connector that looks nothing like the standard Intel pinout.
Do not panic. Shorting the wrong pins can fry your board, but this guide will walk you through the exact pinout, the tools you need, and how to hack the connector to make your PC work.
| Signal | Description | |-----------------|--------------------------------------------------| | AUD_MIC_IN | Microphone input (mono) | | AUD_MIC_BIAS | 3.3V bias for electret mic | | AUD_FPOUT_L | Left channel audio output to front panel | | AUD_FPOUT_R | Right channel audio output to front panel | | AUD_RET_L | Return from front panel jack (for sensing) | | AUD_RET_R | Return from front panel jack (for sensing) | | AUD_GND | Analog ground (pins 14 & 20) |
💡 This audio pinout is not HD Audio (no PRESENCE# or jack detection). Use an AC’97 front panel cable or rewire.