Hi Roy,

Verify that it is getting 12V power. Check the battery voltage level.

If those ideas don't help call Cambridge. They can repair it if necessary.

Good Soaring,

Paul Remde
Cumulus Soaring, Inc.
http://www.cumulus-soaring.com

"Roy Clark, B6" wrote in message
oups.com...
Used my L-Nav without problems in July.

Family and work-related events kept me away until this past week-end.
No audio vario sound from my L-Nav. Makes a short, soft "choo" when
turned on, then nada.

Any ideas or advice?