Amphi no start


Help me out with a problem I am having. Last week the car would not start
from the key. It would only start if I turned the key on then pushed the
button in back. Today I replaced both positive and negative cable and also
cleaned all the connections. Now all I get is the starter motor to turn by
pushing the button in back. It appears that nothing else works. No spark, no
lights, no dash lights, no nothin. It has to be something so obvious but I
can't see it. Any thoughts?
Tim Wick
63 white