iphone 3g 8gig faulty spares or repairs. ?

apple iphone 3g 8gig. the screen has 2 cracks in it but the lcd screen still works fine, the phone turns on but i can only get a faint apple logo and then a faint symbol that says plug into itunes. sometimes it does power up. apart from that the phone was working fine. im sure it will be an easy fix for someone with some knowledge of iphones. £55 ono. buyer to collect from ilkeston. needs to go asap. contact 07908843801 for details.