I have a HTKS14 home theater audio system, and the subwoofer is not working. It appears there is a problem with the digital amplifier (DS-1500), and more specifically, the part 104DS1500. I can see what appears to be hardened brown liquid that leaded out of the components. I would like to either replace the entire amp part, or the circuit board component...but I am not sure how to find either. I searched online, but didn't find any matches to the part number, except in a service manual.