In the worst-case scenario, Roku stopped working altogether.
This will bring up the picture prefs.
Go ahead and change the picture setting to normal.
This should give your gear enough power to function properly.
Restart the rig
Other users said that simply restarting the rig worked for them.
Disconnect the power cord, wait one minute, and then power up your gadget.
If that did not work, consider performing a soft or hard reset on your Roku machine.
