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Speed sensor not functioning

My speed sensor was flashing (green?) so I replaced the battery.
Now I cannot pair with 520 head unit, and speed sensor appears not to function.
Any ideas?
  • Take the battery out, put it in the wrong way round for a couple of seconds and then replace it the right way round.
  • Take the battery out, put it in the wrong way round for a couple of seconds and then replace it the right way round.

    To clarify ... this will do a hardware reset on the device. Luckily nothing is stored on the device, other than (maybe) devices it's paired with, so you loose nothing.
  • To clarify ... this will do a hardware reset on the device. Luckily nothing is stored on the device, other than (maybe) devices it's paired with, so you loose nothing.




    Hi,
    Tried this last night, and still the same result. The speed sensor is not seen by the Garmin of Zwift interface.
    Is there any way of checking it is functioning?
    TIA