I guess I should have gave a little more information. This is the second boat the HDS10 gen 2 has been on but with a different SS module this time. This boat had a HDS10 gen 1 on it and it didn't ever do the NO SOURCE. I replaced the Gen 1 with the Gen 2 and the NO SOURCE problem happens on and off like it did in my old boat. I have two SS modules on this boat with a HDS10 gen 1 and a HDS10 gen 2. It doesn't matter where I put the Gen 2 it has the NO SOURCE problem happen at times but the gen 1 does not. This is why I like it might be a software problem. I have installed the latest updates but have not done a hard reset.