Officjet pro 6970 print head issue

[Pascal06]

Hello everybody,

I've got an HP Officejet pro 6970 since about two years, and from about 3 month it has printing quality issue.

From info I've got from the printer, I printed less than 800 pages since beginning.

Problems started to appear last summer, when yellow became green. When I removed the corresponding cartridge, I remarked that ink has become green. So I changed this cartridge, but the problems was still there.

Then I decided to buy a cleaning kit (cleaning fluid + serynge): the problem was solved during a few hours but came back.

So, I decided to unmount the printer completely to try to understand problem's origin.

I remarked nothing special, except pasty ink on the rubber squeegee (the rubber piece that clean printing head).

I cleaned every little ink trace I could find in the printer. I unmounted printing head and let it soak in cleaning fluid during few hours....

But problem is still there, it prints perfectly juste after a  cleaning, but few hours later quality begin to fall.

I printed 3 printing quality report at few hours between each other, the first one (on the left) has good quality:

Print quality reports

Do you think printing head is out-of-order ?

Thanks a lot in advance for your help.

Best regards,

Pascal

[Pascal06]

Hello every body,

so I decided to change the print head.

I've got the same problem. The first pages are good. I wait a few time, and next pages are really bad.

Can anybody help me to solve this really annoying problem ?

I don't want to resign and trash my printer.

Hi, is there anybody here ?????

Thanks a lot in advance.

Pascal

[Pascal06]

Allo ?????

[Betty0610]

@Pascal06

I recommend you to contact the HP Support Team regarding this as this could be a hardware issue.

Link: www.hp.com/contacthp/

Note:  Select the country accordingly to get the contact details for support.

Let me know if this helps.

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