So it's a stick, you didn't mention that in the OP. First thing I would try is power down the stick by unplugging it. Try the stick in a different inlet on the TV and power it back up and see what happens. It looks like an HDMI plug and not USB, you should have an alternate HDMI socket in the TV.
I have plugged in different holes back there. Made no difference. It has stopped working any at all. Is there a different device I can use other than these "sticks"??
