Day and a half is not THAT concerning. Not quite yet. They are still absorbing their yolk until about day 2 or 3. This is why it is acceptable to mail day old chicks, but no older. They have their own "on board" supply of nutrients to make the voyage thru the mail with no food or water provided.
As others have said, tapping the feeder and water dispenser usually works like magic. When I hatch quail, they could all be sleeping and as soon as I tap something, they come running.
Edit to add: My experience also has shown that you should not be super worried until you start seeing poop. Once that starts coming out, you should expect them to be taking in new food/water. For my birds, the brooder stays pretty clean until about day 3. Then the poops start showing up quick.