Asus V2-PH1 - Manual (Page 63)

4-11 ASUS Vintage2-PH1
• Reset button (Blue 2-pin RESET)
This 2-pin connector is for the chassis-mounted reset button for
system reboot without turning off the system power.
• Hard disk drive activity (Red 2-pin IDELED)
This 2-pin connector is for the HDD Activity LED. Connect the HDD
Activity LED cable to this connector. The IDE LED lights up or flashes
when data is read from or written to the HDD.