I Just bought the nextbook tablet PC with Windows
My first thought is the usual colour of 'fully charged' is green not orange. Red or orange are often 'charging' colours, and if flashing it usually means 'battery / charging error' but suppose it could be different on this model.
Since this tablet is new, you ought to take it back to the retailer and ask them. More than likely they will know if it is broken or defective and replace it for free. My only other thought is let it charge overnight and see if that changes anything. Also make sure you're pressing the correct button, as I don't know the model I don't know if the power button is clearly marked as 'power' or with the 'power' symbol clearly.
Last possibility is if it seems to come on, but only the screen doesn't come on (you weren't clear if that was the case) then that could either be Windows 8 and a software issue or still a hardware issue. The plug to the screen inside the device for instance may have come loose. Alternately it could be just windows. I haven't heard much good about the latest release of their operating system. First thing I'd do though is take it back to the retailer if charging longer doesn't work. It might be a common defect of these tablets, and they should replace it for free with a good one. Read More At : Tablets & eReaders...