Resurrecting this thread. Has anybody taken apart a 520c? I have one as well and finally recapped my AC adapter and started to play around with it. Seems like a solid machine and I was really impressed with the screen in that it had no trouble keeping up with CrystalQuest (esp. as I think it's passive matrix).
If it's all ceramics and tantalums inside, I'd rather not pull it apart esp. as I understand the plastics are delicate. That being said, I know all of my PB 1xx and my Duo 230 had really leaky (goo, not capacitance) electrolytics on the LCD board.