In Hogwarts Legacy, there are a slew of hidden secrets that you must discover. Many of the hidden secrets are hidden behind puzzles or side quests. When you combine them together, you have the Solved by the Bell quest. This quest requires you to solve another bell puzzle that isn't inside Hogwarts.
Solved by the Bell: Where to Find It
To complete the Solved by the Bell quest, you must find a map located in Henrietta's Hideaway, located in the Manor Cape section of the map. Enter the hideaway through the cliffside beneath the ruins.
Once inside, you will need to solve the puzzle to unlock the entrance that will grant you access to the rest of the dungeon. To complete the puzzle, you must place the fire block on the plate in the room and cast a fire spell on the other block.
With the door open, you will automatically receive a map that indicates where you can find it. Be careful, some of the moving floors may be moving. Use Arresto Momentum on the moving floors to keep yourself safe from being shuffled around the dungeon into places you don't want to go. The map will be displayed further in the dungeon.
In Hogwarts Legacy, there's a walkthrough for Solved by the Bell.
Take a look at the map and you will notice that there are many music notes on it as well as the outline of an island. This may seem cryptic, but the area is actually quite straightforward to find. Go to the east to the Floo Flame fast travel marker for Clagmar Castle. You will need to face a lot of enemies and a boss, so be prepared.
Search the area for a series of bells that are strung up in an alternating pattern after all of the enemies have been defeated. These bells represent notes on a scale, as shown on the map. To solve the puzzle, you must hit the bells in the correct order.
In Hogwarts Legacy, here's how to solve the bell tower puzzle.
When placed correctly, the bells will ring the Harry Potter theme song and a chest will appear. Open the chest to get an additional option to your collection and complete the quest.