VIA Technologies EPIA-SP, User Manual, Page: 35 / 94

Installation
27
Power Switch (PW_BN)
Connect to a 2-pin power button switch. Pressing this button will turn the
system power on or off.
Reset Switch (RST_SW)
The reset switch is used to reboot the system rather than turning the power
ON/OFF. Avoid rebooting the system, if the HDD is still working. Connect
the reset switch from the system case to this pin.
Power LED (-PLED)
The LED will light when the system is on. If the system is in S1 (POS -
Power On Suspend) or S3 (STR - Suspend To RAM) state, the LED will blink.
HDD LED (HD_LED)
HDD LED shows the activity of a hard disk drive. Avoid turning the power
off when the HDD LED still has a lit. Connect the HDD LED from the system
case to this pin.