In case you have changed your Sphere settings drastically and are unable to backtrack, you can reset the device to its original settings (Factory Reset) without affecting its firmware. Make sure the Sphere is turned on during this process.
Step 1: Locate the reset button on the back of Sphere between the A/C and PoE connectors
Step 2a: Hold down the button for 5-10 seconds to reset the longer
Step 2b: Hold down the button for longer than 10 seconds to restore all settings