Ever put a cap in backwards? These guys did more than a few.

[Vynuladikt]

Single Capacitor Triggers Motherboard Recall | Design and Development Today (designdevelopmenttoday.com)

 

[FredR]

Well that's embarrassing. I've heard of leaky capacitors on Dell motherboards and Adcom amps. Not incorrect polarity.

 

[Lazarus Short]

What this world needs is a good, solid-state capacitor.

 

[Gepetto]

What this world needs is a good, solid-state capacitor.

They are called varactor diodes, often used in radio and RF applications.