The Asus A8M2N-LA motherboard was made SPECIAL for HP.http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00757531&tmp_task=prodinfoCategory&cc=us&dlc=en&lang=en&lc=en&product=3339286http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00820191&tmp_task=prodinfoCategory&cc=us&dlc=en&lang=en&lc=en&product=3339286
As such Asus has no info on it.
Looking at the second link posted (Motherboard Specifications), scroll down to the bottom, and click right on - Motherboard Layout
Motherboard layout shown (Direction), is the same as is installed in your computer; Processor to the Top, white PCI slots to the Bottom, Ram Memory to the Right.
The plastic front of your computer is the Front Panel.
The area of contact pins on the motherboard, that the cables (Wires) go to from the Front Panel, is the Front Panel header.
Abbreviated F_PANEL 1, at the bottom right corner of the motherboard, is the Front Panel header.
There are 9 contact pins. Two rows.
Across the Top row they are numbered ODD.
Across the Bottom row they are numbered EVEN.
Coming from the Left side of the motherboard towards the right side, on the Top row;
Pins 1, 3, 5, and 7
Coming from the Left side of the motherboard towards the right side, on the Bottom row;
Pins 2, 4, 6, 8, and 10.
A) Pins 1 and 3 are for the HarDDrive activity LED light.
Pin 1 is for the Positive wire. ( + )
If the HDD LED is dim when operating, switch the wires around.
B) Pins 5 and 7 are for a Reset switch, IF a Reset switch is used.
C) Pins 2 and 4 are for the Power On LED light.
Pin 2 is for the Positive wire.
D) Pins 6 and 8 are for the Power On switch.