I just returned from a 6-week business trip and left my LR3 in my driveway. First thing I noticed is that the sensor in the back motion detectors is weak and makes a strange dying "beep". Do those need to be replaced???

 

Check your battery a week battery will cause all kinds of funny things. With this cold weather, I would not be supprised if that is your problem. This issue is a first for me.

 

They do not need to be replaced like 9V batteries. Agree that it sounds like a low voltage problem.