Does the Bose companion 3 have an internal fuse?

Yes, the fuse is inside the unit where the power cord plugs in. Not accessible from outside the unit.

There is a good chance the device is damaged beyond repair and it may require replacement.

To be honest, it sounds as if the system was destroyed . I'm no Electronics Engineer , but smoke and liquid should not be coming out of speakers.

myhairsonfir i did the exact saem thing today im gutted! im also in south america (chile) so found your post to be remarkably similar, though if im honest i only just went out and bought the transformer after it did not work.
Have you managed to resolve your problem? did you get a new fuse?
I hope to hear from you.
Tom

Since this unit dose not come with power adaptor. It has direct plug in in to the port behind the sub-woofer unit and other end to the wall outlet. Is there any way to convert the power supply from UK to US (220v to 110v). For example Desktop PCs have a switch behind every desktop unit to change power from 110v to 220v or vise versa.
Anyone has any idea how to make this happen in Bose Companion 3 system.
I bought it from UK and now moved to US and I want it to work in US.
othervise use waltage adapter to use it

you need to change the adapter . there is no way you can repair

The fact that everything but the power amp is still working, it could be only a fuse protecting the output that needs replacement although this fuse is probably circuit-wise after the main fuse you have already replaced and could be soldered on the board. Worst case, the output modules are blown and require replacement and depending on the power level it may be worth repairing instead of replacing.
Most modern electronic devices can be set or adapted to line voltages from 100-240 Volts and a good percentage of the devices, using the common switched mode power supply don't need any changes made by the user since they can be inherently 'auto-ranging.'

use 220 volts , 50 watts

alot of speakers have some kind of glue or epoxy, so if the screws vibrate out the glue will hold it together. you may have to pry the panel off. hope this helps! good-luck, glen.

email support@bose.com or contact a Bose Support Specialist in Germany; or call US support at 1-800-367-4008. Something very odd is happening here. You are using the same laptop, correct? If not, let me know, as there are some things to try. If Bose has a solution, I'd love to hear it.