Purchased / gift in 2013. Liked the unit so much , I purchased GPS puck, mount bracket and transducer for both boats, MA18 and Robalo cuddy . Unit worked a week ago , now it wont power up!!. Of course factory does not support this unit any longer. I still see this unit for sale, really??? Any suggestions??? Anyone??
Procedure I would follow is to start at power supply and confirm 12vdc, then check the fuse. Depending on what type of connector holds the plug into the unit, you should be able to cobble up a way to check output voltage at point of plug-in to the unit without causing a short. If there's power all the way, then it's the unit.
There's sure to be a how-to on YouTube on how to open the case, or you could take/send it to a shop. My mistake was opening it 1st with some force and yanking the ribbon out of the multi-connector inside and being unable to get it back in. Read/watch 1st and make haste slowly and gently.