User Manual

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NOTE
The LED behavior shown in is default – other patterns may be set via BIOS setup.
3.6.3.2.4 Power Switch Header
Pins 6 and 8 can be connected to a front panel momentary-contact power switch. The switch must
pull the SW_ON# pin to ground for at least 50 ms to signal the power supply to switch on or off (the
time requirement is due to internal debounce circuitry on the board). At least two seconds must
pass before the power supply recognizes another on/off signal.
3.6.3.3 BIOS Security Jumper
CAUTION
Do not move a jumper with the power on. Always turn off the power and unplug the power cord
from the computer before changing the jumper setting. Otherwise, the board could be damaged.
Figure 10: Shows the location of the BIOS Security Jumper. The Pins1&2 and Pins 2&3 jumpers
determine the BIOS Security program’s mode.
Top view
Pins 1&2: jumper position for Normal mode
Pins 2&3: jumper position for Lockdown mode
No jumper: Recovery mode
Figure 10. BIOS Security Jumper Header
Table 22 describes the jumper settings for the three modes: normal, lockdown, and configuration.
Table 22. BIOS Security Jumper Settings
Function/Mode
Jumper Setting
Configuration
Normal
1-2
The BIOS uses current configuration information and passwords for
booting.