Dell XPS 17 L702x NOT CHARGING

Hi, I have a big problem with my laptop.

The battery won't charge, eventhough it is plugged in(the blue light from the ac adapter is on).
When I start Windows, in the lower right corner where the battery icon is, it says: "0% available, plugged in, not charging".

Laptop model: Dell xps 17 L702x

I would really appreciate it if someone could help me.

Thanks,
Bepsy