Roy:

As your L-Nav is most likely the same age as mine, I had similar
problems and found out the internal battery was at fault. Almost
anyone who has an L-Nav from the mid 80's will need to replace the
battery if they have not already. I would try this first. It is easy
to replace BTW. If you have the GPS-Nav, it might need replacing also,
but you must follow the GPS-Nav instructions to keep the security seal
OK. This requires the power to be on to the GPS-Nav while removing the
cover and replacing the battery. See you in a couple of weeks.


Paul Remde wrote:
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?