Awesome.
Early on in my electronics career, I seriously doubted the concept of 'reseating' cards and modules as a potential fix, until I saw it with own two eyes.
It really doesn't take a lot of corrosion, sometimes, to mess things up and even though gold doesn't 'corrode' in the usual sense, it does tarnish, and the action of removing and inserting a card or module can often-times clean that tarnish off and allow things to work again.