iPod "Classic" 60 GB and Bose SoundDock
Unfortunately, without having access to another dock, or iPod, your options are somewhat limited, as there could be a number of things that failed. Because without another dock, or iPod, either the dock, or the iPod could be at fault. With that in mind, your best options are probably to take the iPod to an Apple store (schedule and appointment) and see if they can offer assistance in testing to see if your iPod had a hardware failure.

If the Apple store can't find anything wrong with it, then it may be time to send your Bose SoundDock into Bose to see about repair.