My wife synced her iPhone 3G and installed two new apps yesterday. While my son was playing with one of the new apps in her company (ie no dropping or water) the phone went blackscreen. Son says the rotating gear icon etc did not appear. The app was a Disney game.
The phone does respond to 60 seconds of pressing of the home and on buttons together (ie hard shut down/restart) and attaching it to various Apple brand charges and computers never produces the Battery Charging screen.
Is there anything to be done short of locating a repair shop?