[Jefferado]

Hello peeps. For some reason the backlight on my Sony K850i keeps playing up. Every so often when I type on it the light on the screen just goes off. Then I have to wait a short while and then it appears again. I type a bit more and sure enough it goes again. It is just over a year old and was wondering if this is quite common on these phones and is there any way I can possibly fix it? Would a simple update sort this or is it a bit more than this? Any help would be most appreciated. Thanks.