During my last trip, the sounder did not indicate anymore the deepness after one hour of navigation.<br />It switches off when I change the deep range (about after 3 seconds). Stays on with 0 feets if I do not force the deepness.<br />- My sounder is about 4 years old. 12 month/year on boat.<br />- Battery is ok, 12.5V, engines starts well ...<br />- Did not use for 2 month but two days ago it was working fine for 12 hours.<br /><br />Any advice ?<br /><br />Thanks,<br /><br />Serge
