I'm having intermittent switch malfunctions with the Castle Ball Lock switch (72) on my WoZ. When not working, every time the monkey drops the ball up there, I have to wait for ball search mode to open the door before anything else happens.
It'll work for a bit then just not at all. If I go into switch test, I can press it 10 times and get nothing then 10 more times it registers. After 10 or so successes, I say 'must be working now' and button everything up. Later, it'll fail in a game. Rinse and repeat.
It doesn't matter if I use a ball or my finger. In either case, I hear the click and if it's in the mood, it registers.
All other matrix switches in the row and column work fine.
A multimeter on the switch tells me (or appears to indicate) that the switch itself is functional. Every time I hear the click, electrically, the switch transitions.