Send it in, I will just have to see, It only takes a drop of water in the connector to cause this, as a result of the short, it gets hot and the capacitor melts down and the arcing essentially welds the connectors together. A bit of water could have simply run down the cord. I won't say it is impossible it happened without getting wet, but it is something I have never seen, if it got wet there will be greenish colored corrosion from the reaction of the salt and copper.