https://community.usa.canon.com/t5/Desktop-Inkjet-Printers/Large-black-print-cartrige-on-my-MG5420-almost-new-does-nor-flow/m-p/191522#M45244 <P>Hello.</P><P>&nbsp;</P><P>Troubleshooting with our support group will be needed to narrow down the cause of your issue. Please contact our support group using the "Contact Us" link below for additional assistance.<BR /><BR /></P><P>This didn't answer your question or issue? Find more help at <A href="https://www.usa.canon.com/internet/portal/us/home/support/contact-support/" target="_blank">Contact Us</A>.</P> Fri, 11 Nov 2016 18:00:53 GMT Michael 2016-11-11T18:00:53Z https://community.usa.canon.com/t5/Desktop-Inkjet-Printers/Large-black-print-cartrige-on-my-MG5420-almost-new-does-nor-flow/m-p/191383#M45243 <P>PGBK cartridge does not flow ink. Deep cleaning has no effect. Don't know how the remove the printhead to clean it. Using only Canon carts.</P> Wed, 09 Nov 2016 20:46:24 GMT https://community.usa.canon.com/t5/Desktop-Inkjet-Printers/Large-black-print-cartrige-on-my-MG5420-almost-new-does-nor-flow/m-p/191383#M45243 GT3 2016-11-09T20:46:24Z https://community.usa.canon.com/t5/Desktop-Inkjet-Printers/Large-black-print-cartrige-on-my-MG5420-almost-new-does-nor-flow/m-p/191522#M45244 <P>Hello.</P><P>&nbsp;</P><P>Troubleshooting with our support group will be needed to narrow down the cause of your issue. Please contact our support group using the "Contact Us" link below for additional assistance.<BR /><BR /></P><P>This didn't answer your question or issue? Find more help at <A href="https://www.usa.canon.com/internet/portal/us/home/support/contact-support/" target="_blank">Contact Us</A>.</P> Fri, 11 Nov 2016 18:00:53 GMT https://community.usa.canon.com/t5/Desktop-Inkjet-Printers/Large-black-print-cartrige-on-my-MG5420-almost-new-does-nor-flow/m-p/191522#M45244 Michael 2016-11-11T18:00:53Z