I haven't used my GSC10 S & C sensor for a while, and discovered it wouldn't pair with any of my garmin devices. (910xt & Vivoactive)
Pressing the "reset" button - Just a brief display of a red light notification then to green then off (all very brief)
I then changed the battery to a new one.
Same happens - no pairing, very brief showing of lights then nothing.
Any ideas what's wrong?
Thanks