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.
The USB outs of a TV are usually "date of manufacture USB standard" 500ma. Not enough for a 1A Roku. The Blackberry is USB powered but take a 2.5A power supply! The USB power standard has come along way from the days of dumb TVs.