Flip the table upside down and open the drop leaves so they are flat on the floor.
Make a mark where the pin of the hinge is on the underside of the table to help you know exactly where to place the new hinge.
Remove the old hinge if still attached. Use the screwdriver to take out all the screws and save the hinge in a plastic zipper bag to take to the hardware store with you.
Go to the hardware store and purchase a new hinge that is a close as possible to the old hinge in size and design. Ask a store employee to help you if necessary.
Keep the table upside down and open flat on the floor to attach the new hinge. Make sure your new screws are deep enough to securely hold the hinge to the underside of the table, but not too long that they go through the top. Install the screws using a screwdriver.
Flip the table right side up and test the hinge to see if it is in the correct position. Adjust the hinge, if necessary, by removing it and reinstalling it in a slightly different position.