Yes, there is a fuse inside, but that may not be the only problem.
From the fuse, the voltage regulator is next on the electrical " pathway. " The Beosound 1 is manufactured in Europe, and is originally 220v powered. The voltage regulator is set internally with a jumper, at either 110v or 220v at the factory, depending on the final market destination.
The IC board is next, and this is where it might become expensive. Hopefully in your situation, this will not be the case. Clearly you need an authorized service technician.
As you already have started with your dealer, you might try the following telephone numbers. 847. 590.4944, or 847 590. 4906. These were the Tech Support numbers for North America I have listed in my PDA, as I travel. They are a few years old, but worth trying.
I hope this misfortune does not occur a third time for you, and would seriously look into a good quality surge protector such as Belkin. Given the cost of your Beosound 1, you may be able to recover with Homeowners Assurance or Insurance coverage.
Good luck !