About two weeks ago I dropped my iPhone 4 in the toilet for just a second. I immediately cleaned it off and put it in rice. Later I opened up the back to dry it off better. It still wouldn't power on. I figured the warranty was already void since it fell in water, so I went ahead and got a replacement battery and changed the battery out. Now, the phone won't power on at all (and I've tried every variation of holding the home and power buttons I read about), and nothing happens when I plug it into a wall charger, but when I plug the phone into my computer, iTunes recognizes it, the phone makes the usual noise, and I have all the options from iTunes such as sync and restore, but the phone still won't power on! I have hope that my phone isn't completely dead since it can interact with iTunes, but am at my wit's end trying to get this thing to turn on. If anyone has any ideas about which parts might be malfunctioning or what the specific problem is, I would appreciate it very much!