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Front LED display:

All LEDs display in greed means device run well.

LED RED error Flag:

1. IO LED is RED: Audio stream can not transfer well, includes ADC/DAC/audio networking;
2. COM LED is RED: MCU can not communicate with other unit, includes DSPs, FPGA, GPIO and Expansion Card;
3. Status LED is RED: Includes
    a) device no firmware;
    b) device no config;
    c) device memory read/write fail,
    d) device not in run state.