Hmm.... Try removing 1 ram stick, or if it only has 1, replace it. That's all I got I'm afraid, if that doesn't work then I'm sorry I couldn't help
EDIT: I found this:
• If the battery light is flashing or is steadily orange, the charge is low and the battery needs to be recharged.
• If the battery light flashes green and orange, the battery is too hot. Let the battery cool down.
• If the battery light rapidly flashes orange, the battery may be defective and needs to be replaced.