John Emery

My phone was working perfectly a few hours ago, but when I went outside after a while it just turned off suddenly. I've...

If only a few of the key's are not working something may have been spilt on them and caused them to stick and not function correctly. I would suggest cleaning those keys and if you don't know how to follow the instructions here Sony Ericsson Xperia Pro MK16A Troubleshooting under the Buttons are sticky title.