You say when you plugged in the charger the LED went green, I would have thought it should have gone orange first as the battery will naturally drain by itself.

Try holding down the U key and plugging into a PC and see if the USB symbol appears.

You could try also putting it in to R&D mode (I assume it can be done with the flasher, but I am not sure)

http://wiki.maemo.org/R%26D_mode