My Lenovo Miix 2 11 shut off and won't turn back on?

I first received my Lenovo Miix 2 11 in June 2015, and have been using it since simply for social media, Netflix, and music. I planned on using it in college but now I'm not so sure.
I was browsing Facebook on my device, fully charged, and everything was going fine until it decided to shut off randomly. This has happened a lot, but normally when I hold the power button for 20 seconds, then press the power button again it turns on just fine. Now I've tried that and other combinations of power-button-holding techniques with no luck.
It is currently plugged into the power adapter but there's no light indicating that it is even charging.
Any method I've tried to get it to turn back on fails miserably.
IS THERE SOMETHING I CAN DO OR SHOULD I JUST RETURN IT?

Sounds like the battery has failed or you need a new charger.

Get a new charger and see if it works. Else try a new battery.