Acer IPISB-VR Rev 1.01 front panel header is a 14-pin (actually 13 physical pins, with one missing) connector typically located at the bottom-right edge of the motherboard

After reverse-engineering Acer’s proprietary schematics and testing with a multimeter, here is the definitive pinout for the front panel header.

[Center of Motherboard] 01 03 05 07 09 11 13 (Odd Row) 02 04 06 08 [X] 12 14 (Even Row) [Edge of Motherboard] Use code with caution. Copied to clipboard (Note: Pin 10 [X] is the missing pin or "key") Key Installation Tips

Unlike retail motherboards from ASUS or MSI, OEM motherboards like the Acer IPISB-VR use proprietary, unlabelled front panel connectors. Connecting these pins incorrectly can prevent your computer from turning on, cause the status lights to malfunction, or cause short circuits.