Why Isn't My Condo's Musical Doorbell Working?

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The condo's musical doorbell is functioning only with the standard ding-dong sound, despite having a small box for selectable music. The owner has tried different wiring configurations and DIP switch settings without success. There are no batteries involved, and the transformer, which may be necessary for the musical feature, is inaccessible in the ceiling. The user is seeking advice on how to troubleshoot the issue further. Accessing the transformer may be crucial to resolving the problem with the musical doorbell.
Claref
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I just purchased a condo built in 1992. The door bell is fine in that I get the ding-dong sound.
However, attached to the door bell is a small box with DIP switch selectable music. This box has wires labeled FRONT, REAR, and TRANS.
The wires were attached to the to the corresponding wire on the bell. I tried various wiring and DIP switch settings but I only get the ding-dong.
Here's pics of the bell and small box. Any idea how this is supposed work?

Thanks
 
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We had one of those, but it was battery powered. Have you checked the battery? ;)

Also, your pictures either were removed or didn't work. Try using the "attach" button, that should work, I think.
 
Thanks for the replies.

There are no batteries involved.

Unfortunately I can't find the transformer. It's not in the circuit breaker box so it's probably buried in the ceiling which I don't have access to.
 

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