I just purchased the HP Deskjet Plus 4155. I set it up, printed off some test paper, and copied some papers as well. After not using it for a few hours the scan bar started moving back and forth about 4 inches. (From far left to where it would start scanning a document.) As long as the printer is awake it continues to do this. There is no errors that are displayed. I can get this to stop 1 of two ways. 1. Lift the scan lid (as if I'm going to scan a paper) or 2. Put a piece of paper in the document feeder that is on the lid of the printer. I phoned tech support, and they insisted that this was normal... Seems really weird that they would want a printer that is constantly making noise, when not in use. If anyone could help me out that would be greatly appreciated.
I reset the printer, the firmware is up to date, and I aligned the ink cartridges. It did not help. The scan bar continues to move back and forth unless I have a paper in the top document feeder or have the scan lid open. What other steps could I take?
So the scan bar moves from where it is in the picture then to the left to fill that little window.
If I have a piece of paper in the top document feeder (over white tab sticking up in pic), or have the scan lid open the scan bar will stop moving
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