How weak is the hive? How weak are your other hives? When you say the queen died... was it a queen you bought and placed in the hive, or did you do a walk-away split and let them raise their own?
-If the hive has eggs and larvae, they should raise a new queen. If there are still lots of bees, but no eggs or larvae left to raise a queen from, you might want to consider swapping a couple frames from a strong hive with fresh eggs, small larvae, and capped brood... if possible. No reason you can't mix&match from a couple of your other splits to get what you need. Then the remaining bees should take advantage of the eggs and fresh larvae and raise a queen.
-If the hive is weak... not many bees... and you have a split with a good queen that needs some more bees... then combine them. Piece of newspaper between the brood chambers to combine them.
