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Chapter 1: Motherboard Information
• 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 Management Interrupt Lead (2-pin SMI#)
This 2-pin connector permits switching to suspend mode, or “Green”
mode, in which system activity is instantly decreased to save power
and to expand the life of certain system components.
• Reset Switch (2-pin RESET)
This 2-pin connector connects to the case-mounted reset switch for
rebooting the system without turning off the power switch.
• ATX Power Switch / Soft-Off Switch Lead (2-pin PWRBTN)
This connector connects a switch that controls the system power.
Pressing the power switch turns the system between ON and SLEEP,
or ON and SOFT OFF, depending on the BIOS or OS settings.
Pressing the power switch while in the ON mode for more than 4
seconds turns the system OFF.
12. System panel connector (20-pin PANEL1)
This connector accommodates several system front panel functions.
• System Power LED Lead (2-pin PLED)
This 2-pin connector connects to the system power LED. The LED
lights up when you turn on the system power.
• 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.
P4BGV-MX
P4BGV-MX System Panel Connectors
*
Requires an ATX power supply.
PLED
Ground
PWR
+5 V
Keylock
+5V
Speaker
Speaker
Connector
Power LED
Ground
Reset SW
SMI Lead
ExtSMI#
Ground
Reset
Ground
Ground
Ground
Keyboard Lock
ATX Power
Switch*