Origineel bericht door: PDM ,
Try this: Unplug it, pull the battery out. Now, hold the power button down for about ten seconds. Then, plug the magsafe back in and try turning it on. Leave the battery out for now. See if that works. If not, then you either have a bad AC adapter, or there is a hardware problem with the MacBook. You mentioned a flaky DC-in board, it might be just that.