"My last 2 used SA's puchases both had blown 10 and 20dB attenuator wafers. Never risk DC damage for a half dB. There is no repair possible, just used scrap parts. Lucky for me the mixer diodes were still Ok."
Well, thats not really true. Myself and others have "made one from two". Hard but do-able, especially when you cant find the type you need but have a weird "junker" around (bad connector, weird voltage or something similar).
Asd to the othe comment: Tons of details about the internal sticky O rings and how to replace them, here on the group. Common problem, even in a replacement (40 years old!).
You may not have blown pads, just sticky O rings not allowing the plungers to set the contact fingers fully! Have fun! Jeff Kruth