I've got an iBook G4 (different iBook than the display plagued one) that has some sort of electrical gremlin going on. It's experiencing a few odd symptoms that have pointed to a few different problems, but then something else cancels that out. I'm stumped right now. I've listed the symptoms below as to make it easier to read:

- iBook will run off of battery but not AC power

- Adapter will not charge battery, but does detect it (when iBook is off, plugging in battery prompts adapter to change to orange; when removed, charger turns green.)

- iBook does not detect charger

- DC-In board has been replaced with 2 new ones and 2 known working ones from other iBooks, still nothing.

- PMU reset doesn't help

- PRAM not helping (worth a shot)

- tried a different battery

- tried 2 other chargers, all 3 chargers work on other iBooks

I really don't know where to go from here. I figure it's something on the logic board, but what exactly?

Any help would be appreciated.