I have a 722 and 722K I own and want to sell. Is there a way to do a factory reset? I searched but could not find. I am looking to set it back to factory defaults.
On a 722/722k, you can reset factory defaults by going to Menu > System Setup > Factory Defaults.
Edit: Just as a quick update: Since you're looking to re-sell the receivers, Factory Defaults won't delete the recordings. You'll want to go through there and manually delete them.