Default UG007ii Keeps powering off

I have stock jellybean and this thing was working great for about a month, and now when ever I do anything semi processor intensive, the stick powers off. The little blue light turns off and stays off. If I unplug it and plug it back in, it works fine for a bit, but then powers off again. Happens most when I watch anything on HBO go or Netflix. Seems like it may be overheating, but it was working fine before. Any thoughts?