Inspecting the turd of a Xenon I recently acquired (https://pinside.com/pinball/forum/topic/the-dirtiest-xenon-on-planet-earth). And noticed some white reside on the bottom of the head, back of the display board, and on some screws.
What is this?
It's only in the head. There's no alkaline corrosion on the boards. Somebody snipped the battery in time.
I'm pretty sure the game was stored outside for some time.