I'm building a demo system in my lab, and not one, but _both_ of my HP3325A synthesizers went flatline.
One had almost no output, missing attenuator steps, and distorted wave shapes, and the other one flunked two of its three self-tests. Not good.
Turned out that ripping out the relay boards and cleaning the contacts and connectors with DeOxit fixed both of them. (Score.)
(Thanks to the estimable Herbert Susmann for his web page.)
Cheers
Phil Hobbs