Quote:
Originally Posted by RobertJSawyer
Note: I had to do a soft reset (hold power button for twenty seconds) to get Invert Mode to take effect
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To shutdown the devices, you should only need to hold the power button down for a few of seconds. That should start a clean shutdown and display the powered off screen. Depending on the device, you might need to wait a few seconds before you can turn it on again.
The "hold for twenty seconds" is for non-responsive devices to ensure they are powered off. If it is needed, the device probably will not do a clean shutdown and won't change the screen.