Canon PIXMA MP780 All-In-One InkJet Printer Logo
Posted on Aug 21, 2009
Answered by a Fixya Expert

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Cannon ink jet quit printing black

Cannon mp780 all in one. separate color cartidges.
changed the print cartridge, clean the head, deep cleaned the heads. all with no change in the printing. What are my options from here besides a garbage can

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  • Expert 103 Answers
  • Posted on Aug 21, 2009
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Joined: Aug 17, 2009
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To solve the printing problem..

# Hold the cartridge upside down, with the bar-code label facing you and take a damp paper towel. # Use the towel to wipe the printhead of the cartridge on the bottom (where the ink comes out). Wipe the printhead horizontally in one direction only (left to right). # Continue doing this until it looks clean. # Then dab the cartridge on the towel to make sure the ink is flowing. # Next, look inside the printer and locate the carrier that holds ink cartridges. Caution: Make sure the cartridges are not installed at this point.
1. Look for a shiny piece of metal underneath the contacts at the back of the carrier. 2. Take a damp cotton swab (use water only!) and wipe along the bottom of the shiny metal piece. Note: You may need more than one swab.
# Reinstall the cartridges, making sure you snap them correctly into the printer.

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Not normally but the black print head nozzles maybe blocked.
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If the print head cleaning maintenance routine does not clear the blockages, then print head needs replacing, but it may be expensive.
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Hello!

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https://manualsbrain.com/en/manuals/1796179/?page=45
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  1. Make sure you removed the tape from the ink cartridge.
  2. Press the <Menu> button on the printers operation panel.

  3. Press the left [<] or right [>] arrow buttons to select [MAINTENANCE].

  4. Press the <Set> button.

  5. Press [<] or [>] to select the cleaning setting you want. Select [HEAD CLEANING] for normal print head cleaning. Select [HEAD REFRESHING] for deep print head cleaning.

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  6. Press <Set>.

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If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Thanks, Joe


I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

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Replace and install the black ink cartridge with this Black Ink Tank BCI-3eBK Ifyou have done this and is still missing the black ink on print, clean the print heads. 1. Right-click the printer icon, and then select 'Properties'.
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That should most likely work. If deep cleaning did not help, you may need to replace the print head.
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Solution: Cleaning the Print Head - C555 / C560 / C635 / C530 / C545

Untitled Document Follow this procedure to clean the BJ cartridge print head:
1. Press c755funckey.gif 2. Press c755cleankey.gif 3. Use c755down.gif or c755up.gif to select the [HEAD CLEANING]..
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The MultiPASS cleans the print head.
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