19.System panel connector (20-pin PANEL)
This connector accommodates several system front panel functions.
P4B-E System Panel Connectors * Requires an ATX power supply.
Figure 2-53 System Panel Connector•System Power LED Lead (3-1 pin PWRLED)
This 3-1 pin connector connects to the system power LED. The LED lights up when you turn on the system power, and blinks when the system is in sleep mode.•Keyboard Lock Lead (2-pin KEYLOCK)
This 2-pin connector connects to a chassis-mounted switch to allow the use of the keyboard lock feature.•System Warning Speaker Lead (4-pin SPEAKER)
This 4-pin connector connects to the case-mounted speaker and allows you to hear system beeps and warnings.•System Message LED Lead (2-pin MSGLED)
This 2-pin connector is for the system message LED that indicates receipt of messages from a fax/modem. The normal status for this LED is ON, when there is no incoming data signal. The LED blinks when data is received. The system message LED feature requires an ACPI OS and driver support.•System Management Interrupt Lead (2-pin SMISW)
This 2-pin connector allows you to manually place the system into a suspend mode, or “green” mode, where system activity is instantly decreased to save power and to expand the life of certain system components. Attach the case-mounted suspend switch to this 2-pin connector.
ASUS P4B-E motherboard user guide