How do I fix my Denon Cellena shelf model?

when I turned on my shelf model to play a tape it played for a short time than a loud boom came from it and it shut itself down than I smelled something like burning coming from the unit now every thing works but the problem is I can not get any sound out of it, it gets power because all lights turn on but no sound. How do I fix it, is it fixable?

Patricia Fromherz
September 2009