Hello, I have an HP Deskjet 820Cse Professional series. It has been working fine but all of a sudden, it is loosing communication with the computer even before it starts printing. What happens is when you turn it on, there is the usual sound of the cartridges aligning but instead of them just stopping, it sounds like they are being slammed agains the side of the printer. This is when the communication failure error message comes up. What could the problem be and hos can I fix it. Thanks in advance Mel The NOSPIN Group is now offering Free PC Tech support at our newest website: http://freepctech.com