Electrical question

[Coleus]

this is the fixture so everything was properly wired. I bought a new ballast and replace it and it still does not fire up. For the old ballast, i see a flash in bulb so i know all connection are good. Just want to test to see if the new ballast is defective, so i test the output voltage.
Right now my volmeter reads only around 70 mV AC so i am thinking the new ballast is defective, my old one also read very low output Voltage as well