Iphone 3gs screen trouble?

Today i thought my iphone 3gs just crapped out but realized that the lighting on the screen doesnt come on. I can see the the stuff under a light and everything operates normally but can barely see. I guess my question is if the restore to factory defaults would hopefully work to fix the issue and will i lose all of my pics/videos and contacts as well? Is there anyway the get all that stuff off first or will it store automatically. Any help or suggestions would be appreciated. Thanks, Ryan