Clear Cmos Jumper; Figure 31: Clear Cmos Jumper Diagram; Table 27: Clear Cmos Jumper Settings - VIA Technologies VB7009 User Manual

3.1. Clear CMOS Jumper

The VIA VB7009 comes with a 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 board. The default setting is "Short" pins 1 and 2.

Figure 31: Clear CMOS jumper diagram

Table 27: 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 board.
Setting Pin 1
Regular (default) Short
Clear CMOS Open
VIA VB7009 User Manual
Pin 2 Pin 3
Short Open
Short Short
31