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Old 04-14-2015, 03:30 AM   #2
Megadog
The Demagogue
 
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Join Date: Jun 2007
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Default Re: How exactly does water damage a circuit board with chips and all?

Water conducts electricity. Not well, but it does. It can therefor cause shot circuits if there is water connecting two wires that are supposed to be isolated. It can also cause certain metals to oxidize (rust, basically) if left in contact with the wires, though this is generally prevented anyway due to the fact that the moisture in the air can do this too.

Interestingly, this means that if the electronics isn't turned on until it's completely dry, it can survive relatively unscathed. (This doesn't mean drop your phone in a puddle while it's off, things like that have internal clocks that still run so they don't lose the time if you turn them off. That stuff can still be damaged. If you want to drop your phone in a puddle, while I still don't recommend it, remove the battery and sim card first and leave submerged in rice after it gets wet.)
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