Jumpers; Clear Cmos Jumper: Jbat1 - MSI MS-6390 User Manual

The motherboard provides the following jumpers for you to set the
computer's function. This section will explain how to change your motherboard's
function through the use of jumpers.

Clear CMOS Jumper: JBAT1

There is a CMOS RAM on board that has a power supply from external
battery to keep the data of system configuration. With the CMOS RAM, the
system can automatically boot OS every time it is turned on. If you want to
clear the system configuration, use the JBAT1 (Clear CMOS Jumper ) to clear
data. Follow the instructions below to clear the data:
NOTE:
To clear CMOS, first make pin #2-3 short connected after the
system is off. And then power on the system and short connect
pin #1-2 before entering the BIOS (Standard CMOS Features)
to clear data.

Jumpers

1 3
Keep Data
Hardware Setup
1
JBAT1
3
1
Clear Data
2-21