Hi, a friend of me gave me a destroyed(?) Iphone as a joke. He jumped out in a pool with it in his pocket, and it stopped working (no suprise). I plugged it in a power source and i got the loading mark on the screen for 3-4 seconds and then it blacked out
(1 week after 8-10 days after the pool). I tought since i got a immage on the screen it's only the battery that's broken, and i probbaly could change it to get a perfectly working Iphone 4, is that possible or is it a bigger problem not possible to fix? 
Sorry, my english is not perfect
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Sorry, my english is not perfect