# On-Board LED

![LED location](/helios64/img/led/board-led.jpg)

!!! info
    The bottom side of the board shows LED labels.

LED Name|Color|Description
---|---|---
LED1|green|System Rail Power
LED2|green|Periph. Rail Power
LED3|green|HDD Rail Power
LED4|blue|System ON
LED5|blue|HDD Activity
LED6|green|System Status/Heartbeat
LED7|red|System Error
LED8|green|M.2 Activity
LED9|orange|Battery Status
