Hi guys I'm new here not sure if in rite place I'm having a major issue with my tool cat 5600 . machine won't start i thought it was battery so i bought a new battery , now i have power but when i go to start i hear a clunk and the motor doesn't turn i assumed it was starter so i bought a new starter tried again still doing same thing i hear a loud clunk in the starter but it doesn't even turn over not even sure it extends the teeth . i have 12 volt power @ starter .Theres no codes , Help I'm not sure what else it can be ? is there some kind of ignition switch or something I'm bypassing over thinking maybe any help would be greatly appreciated Thanks in advance Jay