Hello members, I purchased a used pro pointer from a friend of mine. He had bought it less than a year ago from Kellyco's. When using it the first day the unit would for lack of a better phrase "run on", it wouldn't stop vibrating and ringing. Once in a while it would work properly but the next time it would continue ringing and vibrating even while been held in the air. The next day with a new "energizer"battery installed the same thing would happen at different times? In the last 5 outings 4 times I have had problems. Any advice would be appriciated.