VIA Technologies NAB-7400, User Manual

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Chapter 2
18
J
UMPERS
The mainboard provides jumpers for setting some mainboard functions. This
section will explain how to change the settings of the mainboard functions
using the jumpers.
Clear CMOS Connector: CLEAR_CMOS
The onboard CMOS RAM stores system configuration data and has an
onboard battery power supply. To reset the CMOS settings, set the jumper
on pins 1 and 2 while the system is off. Return the jumper to pins 2 and 3
afterwards. Setting the jumper while the system is on will damage the
mainboard.
Setting 1 2 3
Normal Operation ON ON OFF
Clear CMOS setting OFF ON ON
WARNING: Except when clearing the RTC RAM, never remove the
cap on CLEAR_CMOS jumper default position. Removing the cap will
cause system boot failure. Avoid clearing the CMOS while the system
is on; it will damage the mainboard.
LAN3-LAN4 Bypass Enable: J2
Open 1-2, bypass function is enabled for LAN3 and LAN4; short
1-2, then bypass function is disabled.
Normal:
1 3 2
Clear:
1 3 2
J2
1