My wife's MacBook 1,1 has been experiencing some issues. I want to fix them. Here's the list: *Won't sleep. (Close the lid, screen doesn't dim, SD tries to eject every 15 seconds.) *Screen flickers at seemingly random times, though the problem disappears once the machine is in use for more than 5 minutes. *Ethernet port is dead. *Bluetooth is dead. Is all this attributable to a single piece of hardware?