I have a TV with 2 HDMI ports and no USB port. Can I power my Stream Stick + from the 2nd HDMI port using a USB to HDMI cord? Using the AC adapter it isn't convenient with my setup.
The USB power source needs to be 5V 1.0A (or higher) - I'd check the amps provided by that HDMI input.
You might be able to get away with 800mA with the SS+, but below that it may act strangely.
Since your TV is getting power somehow. Use a short extension cord or something to power the Streaming Stick +. In my experience using USB to power the stick usually does not work well.