Why does hitting glitchy electronics make them work?

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If the audio system in my family’s minivan is malfunctioning, or if the clock isn’t displaying in our old Camry, all it takes is a solid whack or two to bring them back online. Why/how does this work?

In: Technology

Percussion Maintenance – a loose wire or electrical connection is moved and will sometimes reconnect. That’s the simple answer.

If hitting it works, it’s because there’s a loose wire or bad connection and jarring it makes it connect.