How do I repair my lg chocolate with a blank white screen?

How do I repair my lg chocolate with a blank white screen?

So my friend has an LG chocolate VX 8500 that she used years ago. As children we used to take a bunch of videos and pictures, now the phone is broken. It only turns on to a white screen. There is also no memory card in the phone. Is there a way we can fix this without loosing the data?