What do the different LED patterns and colors mean?

The power button LED displays different patterns and colors during its normal operation.

Legend

Solid White: Normal Operation
White/Dim White (flashing): The LED flashes between bright white and dim white until all onboard software and firmware is running and the Helm is ready.
Dim White/Black (flashing): Helm is powering off or rebooting
Blue/White (flashing): Bluetooth Pairing Mode; Helm has not yet paired with a phone
Blue (solid): Helm has successfully paired with phone via Bluetooth
White/Green (flashing): A software update or backup restore is being performed. Do not power off the unit while in this state.
Green/Dim Green (flashing): A filesystem check is running. Do not power off the unit while in this state.
White/Red (flashing): Factory Reset is being performed
Red/Black (flashing): High temperature warning; unit should be powered off.
Yellow/Black: No network connection detected
Yellow (solid): A non fatal software or hardware error has occurred.
Red (solid): Fatal error; device is not operational.