Cambridge GPS NAV problem, need help

Hi,

I recently bought a glider and it has a GPS-NAV unit with a GPS20 in
it. It seemed to work fine when I bought it, but this weekend I
powered it up and it comes up with a "GPS Fail Press ON Key". When I
press the "ON" key, it just goes through the cycle again and comes
back to the same page.

It is running LCD version 5.3E, GPS version 6.0. The initial screens
all look good including the internal battery voltage (3.0v).

Any ideas or suggestions?


Cheers,
Morteza