Battery out. Leave it to dry for a couple of days.
Try a different battery; sim card; charging; not charging (try all combinations).
Take it to a repair shop.
2 suggestions.. 1:GET A/S SERVICE TO FIX IT 2:THIS IS WHAT I DID..FIRST,RESTORE THE IPHONE,THEN WHEN IT IS DONE,YOUR IPHONE SHOULD TURN ON IN A NEW HOME SCREEN...GO TO SETTINGS,GENERAL,AUTO-LOCK,AND SET IT TO 'NEVER' .. THAT WAY,YOUR IPHONE WILL NEVER TURN OFF! LOL.. BUT THAT WILL RUN THE BATTERY OUT FAST..
In ways, it can be illegal, but you won't get arrested. I mean Cops or the FBI WONT show up at your door. It just removes warranty. That means they wont fix your iPhone for you. But it is a Third party program and that is illegal.
because your stupid and u don't know how to spell four
i wouldn't do it because if you still have a warranty on it the apple company wont fix it if it has a problem
Make sure it has been on charge for at least an hour then press and hold the menu and power/lock button together for 10 seconds. Your iPhone 4 should then work again. This goes for all iPhones, iPod touches and iPads.
try to check the horizontal transistor
yes your iphone will charge in an ihome. when you plug it in you will get a warning asking if you want to turn on airplane mode but dont cause you wont be able to receive calls or texts. you wont be able to play music from your iphone through the ihome but it will charge the iphone.
Probably because in your settings you diidnt turn on enable 3G or it's broke .and you need a new iPhone .
It is possibly that it is either broken, or maybe you have to charge it.
Well it ussually means that it is dead but if not then its probably broken.
Replace the flasher relay.
you wont be able to turn the steering wheel so easily if you dont fix it you wont be able to turn it at all