There is no sound for the radio, CD player and DVD player.

There was a burning smell while driving the van as if some component had burned. After the incident there was no sound on the radio, CD player or DVD player. The DVD player does work as well as radio tuning without the sound, of course. I went through all the fuses and there were ok. I found a component (IQB14B written on component) in the main fuse box under the hood. It definately had the foul smell of burnt plastic. It is located between the 120A battery fuse and the 50A IGI main fuse. The component is not listed in the manual or the fuse box description. I'm convinced that this is the issue with the sound. I need help locating this part.