How can I tell if the fuse is blown?
For sure please call Sanyo service center to help you (don't wait until the set blow the worst case it can set fire. Buzzing sound usually comes from the component that has coil in it, like flyback, transformer. But it usually comes from the flyback when its leaking. If this the safety fuse you're talking about, when it blows your set won't be able to turn on anymore.
