My HP PSC 1510 All-in-one Printer makes a loud clicking noise before printing, and after I close the front of the machine - you know, when the cartridges slide all the way over to the right side of the machine. When they get there, it's like they want to keep going or something, thus the click, click, clicking. The thing is, it is REALLY LOUD. It still prints normally and movement of the cartridges do not seem to be prohibited.

Troubleshooting steps performed:

-Removed power cord from back of unit. Waited one minute. Reinserted power cord and allowed to fully boot up.
-Removed power cord and USB cable, waited 1 hour, plugged all back in.
-Contacted HP Technical Support via e-mail, but they wrote me back admitting they do not know what the problem is.