I have the lms-337 cdf and have had some trouble with my gps not responding also last time I turned the unit off and reconnected all the plugs back into the unit and it worked fine, good thing because we were out 35 miles on the ocean . maybe you plug has become worn out . "reel it in "
Salty - this does sound like a voltage issue if you recall our e-mails earlier this summer. Send me the Word doc here at work (see e-mail) and I'll cut and paste the text in an e-mail to you. At least that way you could read and print it.
I recall you having battery voltage issues earlier. These units are so sensitive to that. Did you get a new battery or check your alternator? With the soft reboot not working, you're faced with considering the hard reboot (save all your waypoints to a MMC card first) or other tinkering. I'd see if there is a fuse / breaker associated with the module (trace its power cable) and see if it blew / tripped.
