I think the first thing you need to do, is open the case and see if anything looks a little fried. By your description there could well be some evidence of something like this. Then come back to the forum for more advice.
Only open the case if you think that you a qualified to check the components inside, and make sure there is no power lead plug in the mains socket.
Also check to see if there are any labels regarding input voltage, 110v or 220v or adjustment for both?.