I had other problems with my phone. the wifi grayed out a long time ago, then I dropped it and got this screen of death. I thought maybe if I checked all the connections I could fix it but I think I would have to start replacing parts.. didn't see any connections I could fiddle with. It's really old so it looks like this one is spare parts.. maybe I will see if I can put linux on it though. I hate the idea of just junking it.
middle of this photo you can see the little piece that comes out when you take out the battery. it has a gold colored thingy that sticks out and contacts the outer case to ground it. i think.
Though I couldn't fix the phone, I had fun and learned a bit taking it apart and it works at least as well as it did before I disassembled. I'm a genius!