Asus KFN4-DRE - Manual (Page 22)

2-2 Chapter 2: Hardware information
Onboard LEDs
1. Standby power LED (SB_PWR1)
The motherboard comes with a green standby power LED that 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.
2. CPU warning LED (CPU_WARN1)
The CPU warning LED lights up to indicate that a processor is not
installed or the processor is not installed properly in CPU 1 socket.
3. Memory warning LED (MEM_WARN1)
The memory warning LED lights up to indicate that there is no power
in the memory DIMMs.
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R
KFN4-DRE
KFN4-DRE Onboard LED
MEM_WARN1
CPU_WARN1
SB_PWR1
CPU_WARN1
No CPU installed
No CPU on socket CPU1 No detected CPU problem
ON OFF
SB_PWR1
ON
Standby
Power
OFF
Powered
Off
MEM_WARN1
ON OFF
No Memory Power No detected Memory
Power problem