Asus PCH-DL - Manual (Page 49)

ASUS PCH-DL motherboard 2-31
15. Hard disk activity LED (2-pin IDE_LED1)
This connector supplied power to the hard disk activity LED. The read
or write activities of any device connected to the primary or secondary
IDE connector cause this LED to light up.
14. Front panel audio connector (10-1 pin FP_AUDIO1)
This is an interface for the Intel front panel audio cable that allow
convenient connection and control of audio devices.
By default, the pins labeled LINE OUT_R/BLINE_OUT_R and the pins
LINE OUT_L/BLINE_OUT_L are shorted with jumper caps. Remove
the caps only when you are connecting the front panel audio cable.
PCH-DL
PCH-DL Intel Panel Connector
FP_AUDIO1
BLINE_OUT_L
MIC2
Line out_R
Line out_L
BLINE_OUT_R
NC
MICPWR +5VA
AGND
PCH-DL
- +
PCH-DL IDE Activity LED
IDE_LED1
TIP: If the case-mounted LED does not
light up, try reversing the 2-pin plug.