Dell Mih61r Mb Front Panel Pinout Patched Here

Align the 2-pin female POWER SW connector directly across Pin 5 and Pin 6 . Orientation does not matter for this switch since it only completes a momentary grounding loop to jump-start the power supply unit.

Let's tear down the schematic, identify the pins, and get your machine booting. Dell Mih61r Mb Front Panel Pinout

Have a different revision of this board or a specific symptom not covered? Leave a comment below (or consult Dell’s official service manual for the OptiPlex 390/790, which contains the board-level schematics). Align the 2-pin female POWER SW connector directly

If the system halts during POST, bridge with a custom jumper mod or join the secondary grounds together. This satisfies the logic gate requirements of the chipset and allows unhindered operating system initialization. identify the pins