Hi, I know this has been a common problem for most samsung nexus S users, and I have read the other threads but none of the solutions are working. My phone randomly turned off last night while I was chatting on Whatsapp and it wouldnt turn back on. I puled the battery out and put it back on, and no change. I tried putting it on charge using the wall charger and USB and the battery screen wouldn't show up. So i googled it and read a couple of threads about removing the battery, putting the USB cable in and replacing it...tried that and did not work. Lastly, I tried to reboot it using the volume up and down + power button and that also did not work. I have had this phone for two years now, it has been working perfectly fine despite the lagging from the Jellybean upgrade. It is not water damaged, just a couple of chips on the screen and general wear and tear. I did not drop it in the past couple of weeks either. i feel helpless and I really want my phone to just power on. Can anyone help? Maybe I am doing something wrong.