My iphone 3g is second hand, the girlfreind dropped it in a cup of hot chocolate. Her parents bought her a new iphone 4, so i decided i would put the 3g on the radiator and it started working again after a few hours. The screen still worked and it charged. The only faults were the volume buttons and lock button up top. It worked hassle free for over a month and i fell in love with it. However, I was away for a couple of days and couldnt charge my phone and it ran out of charge completly. When i got home i plugged it in, the usb sign came on the screen. I loaded itunes but it came up with a warning message, it knew there was an iphone there but couldnt sync with it. That was the first time that had ever happened. I tried it a few times, even tried charging it in a dock and in the mains but nothing happened. People have tried to tell me to push the lock and home button together but odviously that wont work since the lock button is broken. Any advice or tips i could do to fix it?