I would expect that your Xbox is fried as well as the exact same thing happened to me when the crappy step-down voltage converter that my US Xbox was plugged into gave up the ghost and so did my Xbox (along w/the adapter brick). Suggest you see if you can borrow someone's adapter first to confirm before you do all the leg work. Hope I'm wrong but at the time I hoped it was only my adapter, couldn't find one locally but didn't look terribly hard, ended up finding one on Ebay but didn't buy it (there are two btw, different wattage 100 or something like that for earlier Xboxes like mine vs. a more efficient adapter at 96 or something for later Xboxes, I also seem to remember that they weren't compatible so you had to confirm, that Microsoft makes it incompatible by making the spacings/fittings from the adapter into the back of the Xbox slightly different). Ended up buying a new Xbox here as it had a few good games thrown in and gave my old one to my brother (the electrician) back in the states (who then told me it was fried), problem with that is about 25% of my US games now won't work anymore because of the Region (gives you a very nice message however), most do work, GTA IV doesn't work, Fight Night 3 doesn't, Guitar Hero does, Blazing Angels does, most do but enough don't to be annoying as buying games from the US is so much cheaper. If I were to do it over again I'd first confirm that my US Xbox was still working, I'd then fix/replace with a similar US Xbox so you can play 100% of your old games (I'd also make sure it is plugged into a top notch surge protector/step-down converter as all my US electronics including a Wii are now).
or find someone with an apo so that shipping wont kill you! 
