circuit board

I have a 1997 HotSprings Prodigy (Model H) by Watkins Manufacturing. About six years ago, the circulation pump stopped working. I don't remember if the jet pump continued working. I'm debating whether to remove and test the two pumps, which I suspect are easy to test but inconvenient to remove...

I have a bowers and Wilkins zeppelin. The led doesn’t come on and it shows no indication of power or audio. The lead is fine as it works with another speaker. I have opened it and noticed some discolouration around one of the ceramic disk capacitors could this be the issue? Everything else looks...