Hi slord,
Thank you for using the Support Forum. Please take a look for the solution that explains the noises of the machine. If the sound is constant and never stops then you should consider contacting your support centre for further assistance.
My Xerox Phaser 8560 makes non stop noise as though it is about to print or scan. It never goes to sleep. This has been going on for several days. I have tried turning off and on and unplugging. The machine still prints, but the noise is relentless. I only get one error which says to unlock the scan head and turn the power off and on. I have done this several times and when I turn the machine back on it resumes its relentless noise.