Things You'll Need
Instructions
Place the key in the lock and tap it with a hammer. If the locking mechanism is the problem, this will sometimes help the key catch the lock and unlock the latch so the lid lifts back off.
Remove the hinges. Use the screwdriver to remove the screws holding the lid in place. These are located at the back of the chest.
Lift the lid from the back. If the latch in the front remains locked, the lid will pull up and need unlocking to lift completely off. If it comes unlocked, the lid will lift away smoothly.