They really don't build them like they used to. I just repaired my sister's 12" PB's DC card and it refuses to die. You'd be best just getting a new machine and honoring the PB with some kind of shrine as a monument to good engineering. Luckily (really not) the newer machines don't last half as long so you should be able to pick up a new one every two years or so from here on out. 
Don't kill the PB, just keep it around for brainless tasks like downloads or network stuff.
Don't kill the PB, just keep it around for brainless tasks like downloads or network stuff.