Do not turn it on. Unplug it and take it to a dry area. Remove the casing or back and blow dry with low pressure air. Do not attempt to turn it on until it is completely dry.It is best to have a professional electronic restoration company, like Woodard, restore them for you.
If you have any electronics damaged from either a fire or water invasion, the sooner you get them to Woodard, the higher the chances are that they can be saved.