It would help us answer your question if you could be more specific about what you have done, what you have observed and how far into the "Power up" sequence you DO get. The questions I'd ask...."Does the battery check work on both of your batteries when they are NOT installed in the Phantom....do you see 4 green lights when you press the "On" button briefly...and when you do the quick 'One press, then another press and HOLD...do you get anything at all then??" OR...do you get through all of this...and are you then unable to turn on the propellers...?
Have you looked at some of the YouTube videos about how to do through all of this??