I think My Hive is Queenless
No eggs, no larvae does not necessarily mean you are queenless. Here is a simple method to help you know for sure… Shake the bees off of a frame of uncapped brood (eggs and young larvae) from a queen-right colony, being careful not to transfer the queen from that hive. Mark that frame with a magic marker. Remove a frame from the center of the brood chamber of the suspect colony and replace it with your marked frame.