On Mon, 13 Aug 2007 12:56:10 -0700, Josh Assing
wrote:

Thanks for your thoughts.

Two issues.

1 - The unit may need to be reflashed and that's only done at a
service center.

2 - The most likely cause based on your symptoms is a cracked crystal
in the transducer. Replace the transducer first and see if the
problem goes away.

3 - Don't take any crap from Garmin. Their customer service, in my
experience, is lousy.