I have report of a circuit board failure. The board was 20+ years old, and included at least one electrolytic capacitor. That capacitor would then be beyond its expected useful life. The board was still functioning, until the moment someone moved the panel the board was attached to. At that point, the board immediately failed, and has not recovered. Component-level failure analysis is not possible in this situation.
It occurs to me that the electrolyte in the capacitors is liquid, and thus subject to motion, perhaps moreso if the capacitor is partly dried out. So if an electrolytic capacitor is old enough that it should be considered end-of-life, but is still functioning and energized, is it possible that moving the energized capacitor would precipitate its failure?