Hi everyone, one of my collars is not working correctly. It will not deliver a nick. It will still beep and lights will come on, but no nick. In fact, when I hit the button on the remote the green light comes on as if it did nick but it’s not. After seeing no response on my dog I tried it on my hand, nothing. Anyone had this happen? Any solution or just buy a new one? It’s about 2 years old. Thanks!