I would repair them then take the collar over and test it. many give a tone prior to shock but many don't so I would shock myself to test it. I have done that thousands of times and don't feel it is too harsh, it is more startling than anything.
I think people that aren't familiar with them think they are like a taser, a cattle fence or an electric chair....it is more like the static shock you get from the doorknob during cold, dry weather. It is far more startling than painful....in fact, invisible fence here won't install a fence for you if you won't zap yourself...just so you know exactly what it does.

Everyone says that women talk alot....every hasn't met you. 



