Thanks for letting us know about the issue you're experiencing.
We're here to help. Could you tell us how you are powering your Roku device? Is it connected to the TV's USB port or to a wall outlet? The Roku streaming player that is connected to the USB port on your TV will lose power when the television is turned off. This means that your Roku device must “boot up” every time the TV is turned on.
Using the included power cord and power adapter, we suggest plugging your Roku into a working power outlet in the wall. Powering it through a power outlet in the wall has the additional advantage that your Roku player will not need to power up every time you turn on your TV. This means your Roku player will be up and running faster than connected to a TV.
Keep us posted with what you find out.