910xt not picking up cadence sensor

You get the red LED flash EVERY time the crank magnet passes the sensor during the test period?

If all you get is the red/green LED flash right after pushing the button, that is just letting you know the test period is begun and presumably that the sensors are in a state ready to function.

yes, the LED flashes red and green every time the crank and wheel spoke magnets pass it during the test period.

Does the 910xt use profiles? and is the ant sensor setup within the the profiles? If so, then double check that it's still showing as paired. And are you sure you were using that profile the day of the lost cadence info?

only one profile and one bike (for now)

The issue is probably in the 910xt. Either it's not paired anymore with the sensor, a "glitch" has occurred that has stopped it from using the data from the gsc10 or the ant receiver in it is no longer functioning, but if you get HR data, then receiver problem is unlikely. Maybe you need to do a hard reset, but that sometimes causes loss of all your saved data and setups.

There is a chance the gsc10 is not transmitting any more. See if someone else will try to pair their device to your sensor. That will help confirm where the issue is.

There should be some more people knowedgable about your 910xt in the 910xt sub-forum. Likewise there are a lot of knowledgeable users in the speed/cadence sensor sub-forum. Typically this sub-forum is for troubleshooting Garmin Connect website issues (IMO).

I don't have a 910xt so I'm well past my limit with useful advice.

thanks man. i'll have to play around with it more and see if it works (thats what she said).

ugh. did a hard reset, lost all my personalized screens and stuff on my 910xt, but still not picking up my gsc-10.

ETA: it is picking up the Heart rate monitor, so i guess the issue is in the gsc-10. i'll try swapping out the battery on the cadence sensor tomorrow.

and all it needed was a new battery. brb, returning my engineering degree.