Problem With Pro-Find 25 Pinpointer

[MSC]

I just received my new Pro-find 35 as I like that it disconnects from the battery and coil when shut off. I had and have the 25 still but have had problems with it. It ran fine for 2 years, but this year after detecting in a hole and detecting something in the hole, after pulling it out, it kept beeping and wouldn't stop until I shut it off, It does that all the time now. It now also is picked up by my detector. That has continued for the rest of the season and is no longer of any use. My friend, that I met up with in November, purchased a 25, removed it fresh from the box at camp,  is acting the very same brand new. I though I may have messed mine up somehow before seeing his. Has anyone else have this happen to their 25?