Garmin GPS 3 Problem..... HELP
 

I have a Garmin GPS 3 Pilot and have a problem with it.:\
The unit is working 100% until I switch on the back-light feature.
When the back-light is switched on, it will loose the GPS signal within
a minute or so, if I switch it off and on again it will work again....
cant use the back-light feature or it looses signal again.:(
The unit is powered from the aircraft via the external power cord and
I have recently updated the units software and database via Gamin's
website.
I have run it without batteries & with fresh batteries but the problem still is there.
Any help appreciated.
Jon
(ps) This thread is posted in other forums, sorry if you are seeing it for the 2nd time !:ugh: