paradigm subwoofer buzzing looking for advice.

Hi all! I have a paradigm subwoofer <10 inch can give you the model if
you need it> that has a hum/buzz emanating from the controller board
that I am about to open and attempt to repair.No I won't do anything
crazy with it.
I was wondering if anyone had any advice or things to look for that
might be the problem for when I finally do rip it apart.
The buzz is definitely coming from the board, and not the speaker, and
is fairly minor in nature, as I didn't notice it until I was
manhandling it into a new location.
It is a similar buzz as to what you get with a badly grounded turn
If you need any more info or have any questions please ask, and I will
do my best to answer.
thanks for your time.
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