If you cannot get the Sensor to boot, try the following:
Check to ensure that the Sensor is powered on. Check the LEDs on the front of the Sensor.
Check the front panel LEDs to ensure that the Sensor temperature is normal. For more information on Sensor LEDs, see the Trellix Intrusion Prevention System NS-series Sensor Product Guide for your Sensor model.
If you see an error message OS not found in the CLI, you might have a corrupted internal flash. If you encounter this error, contact Technical Support to obtain help in recovering the Sensor.