@codeWhisperer that's adhesive. When a capacitor goes bad, you'll see a bulge on the top.
@codeWhisperer I did a search of the numbers and didn't come up with anything...then just thinking about the issue of it buzzing for 15 minutes before it settles down and I'm sorry to say I don't have an answer.
@JohnRadcliff Understood, and usually there is a crosshatch to help with the pressure. But I am unfamiliar with this rectangular packaging. Wasn't even sure if it was a cap or some sort of inductor.