Technical Reference 
47 
2.3  BIOS Configuration Jumper Block 
 
  CAUTION 
Do not move the jumper with the power on.  Always turn off the power and unplug the 
power cord from the computer before changing a jumper setting.  Otherwise, the 
board could be damaged. 
Figure 12 shows the location of the jumper block.  The 3-pin jumper block determines 
the BIOS Setup program’s mode.  Table 22 describes the jumper settings for the three 
modes:  normal, configure, and recovery.  
 
Figure 12.  Location of the Jumper Block 
 
Table 22.  BIOS Setup Configuration Jumper Settings 
Function/Mode  Jumper 
Setting 
Configuration 
Normal  1-2  The BIOS uses current configuration information and passwords for 
booting.   
Configure  2-3  After the POST runs, Setup runs automatically.  The maintenance menu 
is displayed.  
Note that this Configure mode is the only way to clear the BIOS/CMOS 
settings.  Press F9 (restore defaults) while in Configure mode to restore 
the BIOS/CMOS settings to their default values. 
Recovery  None  The BIOS attempts to recover the BIOS configuration.  A recovery CD 
or USB flash drive is required.