Asus RS700-E6/RS4 - Manual (Page 47)

ASUS RS700-E6/RS4 4-11
4.4 Internal LEDs
1. Standby Power LED (SB_PWR1)
The green LED lights up to indicate that the system is ON, in sleep mode,
or in soft-off mode. This is a reminder that you should shut down the system
and unplug the power cable before removing or plugging in any motherboard
component. The illustration below shows the location of the onboard LED.
2. Baseboard Management Controller LED (BMC_LED1)
The BMC LED works with the ASUS ASMB4 management device and
indicates its initiation status. When the PSU is plugged and the system is
OFF, ASUS ASMB4 management device starts system initiation for about one
(1) minute. The BMC LED blinks after system initiation finishes.