Hi @Anonymous User
The power button on the stick remote is for putting your television into on/off standby mode and doesn't switch off the stick.
The stick should go into a low power save mode after a while when not in use.
If your stick is using the USB off your television then when you normally put the television in standby mode (using your television remote in this case because your stick remote power off button doesn't work) should drop the power off the USB port on your television and power down the stick.
I would go into the Stick menu settings and under the Remote option manually go through the code numbers one at a time to see if you can find the code number that works with your television.
Can't see no harm done switching the mains power off to your television if the stick is connected to the television USB port for the stick power.
If you are using the supplied power adapter with the stick, then switching off the television at the mains will do nothing with regards to the stick.
I tend to leave my NowTV boxes plugged in overnight at the mains and let the box go into its automatic power save mode.
Again there is no harm in unplugging the stick or box at the mains if you are concerned its your choice.
