While we were out caching yesterday my Garmin totally 'locked up' - the only way to get any action from it was to take the batteries out, put them back and then it worked again [But I didn't do that till I got home as I thought I would loose all the info ie the caches I had put in. I couldn't even switch it of and re-boot it.
Before this happened the compass was doing a tango, hardly settled and kept giving different directions and distances - kept me a spin! At the same time George's smart phone was also misbehaving - similar action [but it didn't 'lock up']. So all in all it was difficult to home in on the caches.
The area we were in was by a canal, but also a main train line which was quite busy.
Can anyone throw any light onto what was happening please? Many thanks for any help. Jenny
 

Thanks WT - sounds just like mine, and yes I have an Oregon 600 series. Wonder what causes it? If there is a Garmin stand at the Welsh Mega they might be able to explain it - they sorted out a problem for me at the Essex Mega last year.