Pixma iP4000 - no ink on paper, many items checked, no idea what to do

[gitarzysta]

Hello,

All of a sudden I started to get very poor quality prints and then virtually no prints at all.
What I did:
- deep cleaned the head (via software) dozen of times
- changed ink cartridges
- cleaned the print head (3 times) with dedicated solvent
- confirmed ink flows through the head - right after print head cleaning, ink cartridges were reinstalled and then removed and I could observe fresh ink on the head
- checked the purge unit - no pipes loose, the home position sponges were cleaned and became dark again - I assume it means the ink flows somehow
- I also checked if any ink drops can be seen from the purge pipe ends (where the absorber is) - I removed the printing unit so I could see it from the bottom - and yes, some ink is ejected from the pipes

Any ideas what I could check next?

Any help will be very appreciated!

Best regards,
Gitarzysta

 

[ghwellsjr]

Do you get the same reaction when you specify plain paper or any photo paper, such as matte? Or you printing fullcolor images or just black?