I only have bad news for you, sorry. Mine gave up after 8-9 years of regular use(weekender/coastal). In 2011 I took it to the Raymarine tec. for repair after months of internet searches with no results.(internal casing split) His take was there are no parts around to repair these Smirad WP. I ended up getting a new Raymarine P70WP. Much beefier than the Smirad and a few new high tec up grades too. Any way not what you wanted to hear but this was my experience.