i had problems with my hds-5 in the spring, was out one day in the rain, and the screen went blank, unit was still on, but it wouldnt show any thing other then a black screen.
i called CMC Electronics at 1-800-661-3983, they are lowarance's canadian warranty rep.
they had me try a bunch of things, then said, the unit was screwed, and i could mail it in, it would take like 4 weeks, or i could drive to there office just past toronto, and i could get a new unit on the spot.
if you’re in Canada and have technical issues or are in need of service please contact CMC Electronics at 1-800-661-3983 by phone or by email at
navcommsales@cmcelectronics.ca. Any products returned for service must be accompanied by a Return Authorization number. Please have your proof of purchase and serial number of your unit handy prior to contacting your CMC representative for any warranty related issues. Hours of operation by phone are Monday to Friday 8:30-4:30 Eastern time.
http://www.lowrance.com/Support/Service-Information/