I step on my Garmin Index S2, it registers me, it shows my weight, and then powers off. I stand on it and two feet appear without a question mark so it knows I'm barefoot. I've tried resetting, replacing the batteries and wiping the surface. Resetting and reconnecting works for first weighting but then it goes back to only showing weight and immediately powering off and restarting with a triangle. My body weight registers to Garmin Connect, but nothing else does.
