I guess I should have been more specific. The problem is not with the 740, but with the intermittent connection to my power port.
I have to use a three way adaptor to connect the GPS, ADS-B & intercom. It is rather bulky and the slightest displacement of the adaptor causes power loss. With the intercom connected if it gets suddenly quiet I know exactly where to look. A little push on the adaptor and all is well. Without the intercom silence clue I don’t catch the power loss until I look down at the GPS and discover that it is off.
I would just like to have the unit stay on battery and give me a notice rather than turning itself off after 15 seconds.
Thanks!!
PS: I love my 740!!!!!