Jumpers; Clear Cmos Jumper; Figure 23: Clear Cmos Jumper; Table 22: Clear Cmos Jumper Settings - VIA Technologies EPIA-P900 User Manual

3. Jumpers

3.1. Clear CMOS Jumper

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 2
and 3 while the system is off. Return the jumper to pins 1 and 2 afterwards.
Setting the jumper while the system is on will damage the mainboard. The
default setting is on pins 1 and 2.

Figure 23: CLEAR CMOS jumper

Table 22: CLEAR CMOS jumper settings

Note:
Except when clearing the RTC RAM, never remove the cap from the 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.
CPU
VIA Eden X2
VX900H
JM1
1
Setting Pin 1
Normal (default) On
Clear CMOS Off
EPIA-P900 User Manual
normal reset CMOS
Pin 2 Pin 3
On Off
On On
27