The Equalizer Amp has heart-shaped lights to tell you the status of the amp.
Normal light displays
Flashing white light: Booting.
Slow (10 second) pulsing white light: Normal operation.
Error light displays
Slow (10 second) pulsing purple light: Offline Mode.
Red flashing light: No data from power meter.
Slow (10 second) pulsing red light: Error. Contact customer support.