Returning it seems a very good thing to do.
I have a Lenovo laptop which doesn't start up. His battery is integrated, so I can not get it out from my laptop. When charger is connected, the charging indicator light's work, but the laptop doesn't start from the button. Yesterday, it worked, but after some minutes, it shutted down and now it is in the same situation. What shall I do? I bought it new, should I send it back? I had the same situation some weeks ago, but after some days, it worked until now.