Mainboard K8X250
14
The following steps explain how to reset your CMOS
configurations when you forgot a system password.
Power Selection for Keyboard/Mouse: JKBMSV1
Keyboard and mouse attached to the back panel JKBMSV1 ports can awaken the system from
sleep mode. In order to enable this functionality, you must adjust the jumper caps on
JUKBMSV1 header for +5V or +5VSB mode.
JKBMSV1
Assignment
Assignment
1
Pin 1-2 Close
+5V
+5V for PS/2 keyboard and mouse
1
Pin 2-3 Close
+5VSB
PS/2 keyboard and mouse are powered
with +5V standby voltage.
Note:
Close stands for putting a jumper cap onto two header pins.
Clear CMOS Jumper: JCMOS1
The “Clear CMOS” function is used when you are unable boot your system and need to reset
the BIOS settings (CMOS settings) back to the manufacturer’s original settings. This is also a
way to reset the system password if you have forgotten it.
JCMOS1
Assignment
Pin 1-2 Close
Normal (Defult)
Pin 2-3 Close
Clear CMOS Data
Note:
Close stands for putting a jumper cap onto two header pins.
1. Turn off your system and disconnect the AC power cable.
2. Set JCMOS1 header to OFF (2-3 Closed).
3. Wait several seconds.
4. Set JCMOS1 header to ON (1-2 closed).
5. Connect the AC power cable and turn on your system.
6. Reset your new password.
