So, my second hand N900 has been sitting idly for a few weeks. Needless to say the battery was dead. But no matter how I try to charge it, the device won't show any signs of life. I've tried detaching the battery etc, but nothing seems to work. When I try to start the device it stays completely black, with no life signs. When charging, the indicator light will stay yellowish for about an hour and then turns off.

As the previous owner really didn't use the device, I doubt that any updates have been done to this phone. So, it should not be a software issue (of an update gone bad).

Any ideas? I'm completely clueless now.