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Silica will only really help with liquids as it absorbs moisture.
What is the fault with the camera, will it turn on at all, or show any sign of life?
Right the camera needs to be stripped down, and cleaned.
You will probably find the terminals are either shorted or corroded, so need cleaned.
Its worth checking the battery is charged by using a multi meter across the terminals, as it may well be the battery is totally flat, at which point a new battery may also be required.
Due to the complexity of this model I would suggest you send it away for repair, my advise is using Digi Cam Fixer I have referred customer to them a few times and they have always heard good things, their number is *****(###) ###-####/p>