JP2 is used to select the power of the PS/2 keyboard/mouse port. Selecting +5V_standby will allow you to use the PS/2 keyboard or PS/2 mouse to wake up the system.
PS/2 Power Select
JP2
3
1
2
3
1
2
2-3 On:
+5V_standby
1-2 On: +5V
(default)
See also other documents in the category DFI Computer hardware: