maybe the battery went dead?
I know yrs back when I first tried the wireless cam's
, mine would go thru a set of battery's every 2-3 days IF that, (all depended on how many pic's it sent, sometimes, would go dead in one day if a lot of pic's
and I couldn;t use it as IS over a feeder, would never make it thru a day on stock battery set up)
I ended up adding a solar panel and a larger exterior battery, and that solved it, but it sure sucked down battery's sending pic's