https://community.usa.canon.com/t5/Office-Printers/Our-iPF8400-is-putting-down-black-lines/m-p/179334#M4626 <P>Hi cascone.</P><P>&nbsp;</P><P>I will be able to assist you.</P><P>&nbsp;</P><P>Normally this issue indicates an issue with the print head.&nbsp; Please perform the Head Posi. Adj. by following the instructions at the link below:</P><P>&nbsp;</P><P><A href="https://support.usa.canon.com/infocenter/index?page=content&amp;id=ART138351" target="_self">iPF8400 - Head Posi. Adj.</A></P><P>&nbsp;</P><P>If the issue persists, it is recommended that you call us at 1-800-OK-CANON (1-800-652-2666) for further assistance.</P> Thu, 14 Jul 2016 22:29:00 GMT Patrice 2016-07-14T22:29:00Z https://community.usa.canon.com/t5/Office-Printers/Our-iPF8400-is-putting-down-black-lines/m-p/175213#M4445 <P>Suddenly our iPF8400 is creating short horizontal lines one on top of the other for about 3". Could it be related to a low ink supply?</P> Sat, 04 Jun 2016 13:24:04 GMT https://community.usa.canon.com/t5/Office-Printers/Our-iPF8400-is-putting-down-black-lines/m-p/175213#M4445 cascone 2016-06-04T13:24:04Z https://community.usa.canon.com/t5/Office-Printers/Our-iPF8400-is-putting-down-black-lines/m-p/179334#M4626 <P>Hi cascone.</P><P>&nbsp;</P><P>I will be able to assist you.</P><P>&nbsp;</P><P>Normally this issue indicates an issue with the print head.&nbsp; Please perform the Head Posi. Adj. by following the instructions at the link below:</P><P>&nbsp;</P><P><A href="https://support.usa.canon.com/infocenter/index?page=content&amp;id=ART138351" target="_self">iPF8400 - Head Posi. Adj.</A></P><P>&nbsp;</P><P>If the issue persists, it is recommended that you call us at 1-800-OK-CANON (1-800-652-2666) for further assistance.</P> Thu, 14 Jul 2016 22:29:00 GMT https://community.usa.canon.com/t5/Office-Printers/Our-iPF8400-is-putting-down-black-lines/m-p/179334#M4626 Patrice 2016-07-14T22:29:00Z