Hello, my facet rtk stopped working, a “GNSS FAILURE” message appeared and it turned off now it does not turn on 
Does a COM port appear when you connect it via USB?
Sorry for the slow reply! A few of us have been out sick recently. Please connect to the device over serial: https://docs.sparkfun.com/SparkFun_RTK_ … th_serial/ And report back what the device outputs at power on.