No brood at all? Five weeks is too long to have waited. For package bees, usually the queen starts laying within a week, although sometimes it may take up to two weeks. At this point, your best option may be to combine the weak hive with your other hive. If your other hive was strong enough, I might suggest taking some frames of brood from it and adding them to the weak hive, along with a new queen, but since your other hive is still getting established, I don't think that's a good option.