My laptop had gotten pretty old and the battery would not charge so I bought a new battery. I soon noticed that the new battery would not charge either. When I plug the cable in it charges for a few seconds and says "plugged in, not charging" in the system tray. If I take the cord out then plug it back in it works fine... For about 10 seconds, then say not charging again. I finally thought it was the ac/dc power cord, so i bought a new one. The first time I plugged it in it had a slightly different result. It started charging then said "28 minutes to full charge" but after a little bit it said "plugged in, not charging". After unplugging and replugging it does the same thing as before. I should note that running the laptop without the battery (only the cord) works fine.
thanks for all your help