How can I fix my lg gw520?

I have had my lg gw520 for about 3 months and I have so far only had one problem with the texts which I resolved.
however one day I was texting a friend when my phone froze, I knew that happened a lot so I took out the battery and re-inserted it as I normally do but when I turned my phone on the lg logo appeared as normal then the screen went blank and did the same repeatedly. I don't think it is my battery as I have never over charged it and if I charge it whilst it is off it does the same thing
i will be very grateful if anyone has a solution.
Thanks