Understanding Led Indicators; Power And System Leds - D-Link DGS-1224T Manual

UNDERSTANDING LED INDICATORS

The front panel LEDs provides instant status feedback, and, helps
monitor and troubleshoot when needed.

Power and System LEDs

Power: Power Indicator
On When the Power LED lights on, the Switch is receiving power.
Off When the Power turns off or the power cord has improper connection.
CPU: Management Indicator
Blinking When the CPU is working, the System LED is blinking.
On/Off The CPU is not working.
Figure 6. LED indicators of the Switch
13