dbinvt

My wife was incredibly excited to be one of the first folks to get an iGroove for Christmas when they first came out. This has been a staple in our dining room for many years. But in the last few months, the right side woofer buzzes and distorts quite badly - to the point this is becoming unlistenable at anything approaching normal volume. I carefully disassembled everything, hoping to find an easy-to-spot culprit, but to no avail. This has a lot of sentimental value to us. There are a few references to others experiencing the same problem but no solutions. Any ideas (other than replacing this old unit)?