Internals of computers are 12 volts or less, so electrocution is not really possible. Even the power supplies are usually 19 volts and split among outputs. You couldn't even get a shock with the power turned off like you could with TV sets, even if unplugged.
You shouldn't be touching anything metal and leaving salt inside the machine, anyway.
Given the difficulty of dismantling laptops and getting them back together, you may want to take it to someone who has experience with that model.
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