My Hayward goldline controls installed in 2007 recently started giving zero salt reading and shut down chlorine generator. Physical test shows 3000 ppm salt. voltage in diagnostics display shows "0" on one side. I replaced the cell thinking that was issue but no change. Installed new "GLX-PCB-Main" board. Diagnostic menu doesn't toggle any chlorinator data. Its as though it doesn't see any cell attached to system. When I scroll thru diagnostic menu it displays "Main Software 2.93". My original board that did recognize the cell displayed "Main Software 2.66". Does anyone know if this is why I don't see cell? Can I get a replacement board with 2.66 software?