I buy, fix and resell iphones as a hobby 3g and 3gs are the most common
the 2g are kinda like throw aways I do not fix phones for people just for my profit
Sounds to me that the LCD is shot. I just finished one the other day when turned on it had the white screen ordered the LCD and glass and works fine of course it took like 2 weeks to get the parts (Hong Kong) but hell they are the ones that made Apple in the first place
ohh and ifixit.com is a great place to learn also missionrepair.com you can send it to them and they will fix it they also have a protection plan