If you are experiencing issues with your Roku 3, then you may be interested in doing a hard factory reset to fix common problems. Here are the steps to do just that.
Reset from Menu
From the Roku home screen, select settings > factory reset, and follow the on-screen instructions.
Reset from Button
Locate the reset button on the Roku 3 player. You will find it on the backside of the player, below the power connector. Using the tip of a pin, or a paper click that’s opened, press and hold the reset button for about 15 seconds, then release that button. That’s it, you have now performed a factory reset.