Alright! I got everything cleaned up, upgraded, and put back together. And it looks like it's working! I should be asleep though...
Alright, never mind. Seems something's not right. I'm getting, I think, unaligned memory access error messages. Sometimes the screen will turn on, sometimes it's just black.
I read a thread around here that they left it overnight and it worked in the morning. Something about charging or whatever, so I'll try that.
I did do a bit of research on the memory thing. Some say the RAM might need just reseating. If that's the case I'm hoping it's the SO-DIMM. It's a pain taking this thing apart. I'm worried I'm going to crush some wires or forget to put thermal paste or plug something in.