Question about HP OfficeJet Pro k550 Printer
Air in all feedlines
one or more colors not printing at all or light print or one or more colors with streaks. I will run several printhead clean cycles and heads will start to print correctly. I will print several pages of mixed text and graphics and the problem will repeat. printhead health will change to fair on one or both printheads. KY printhead New, MC printhead used,
Ink Levels K 95%, Y 54%, M 76%, C 71%, Genuine HP Ink 88XL cartridges, from Sam's club less than 2 weeks old. Page counts as follows Tray 1 = 144, tray 2 = 699, Auto duplex = 28 total = 871.
Printhead expiration date: KY 11-26-2009, MC 4-23-2010 Ink Expiration: Bkack: 6-4-2011, Y-C-M all 7-2-2011, after several cleaning passes one or both printhead helth may return to good.
I have had this happen a couple of times and have cured it easily. It has only happened with the black with me. It seems to be caused by air in the ink feed line. With the printer switched on open the top cover and hold the resume button for 5 seconds. The printheads should move to the left and you may be able to see air in the pipe(s). Remove the printhead of the offending colour(s) then insert a syringe with the plunger fully down into the rubber that the printhead connects to. Draw up the syringe plunger to draw ink/air through until you can see no more air in the pipe. Replace the printhead and close the cover. The printer should now do a calibration with the offending colour hopefully now working.
Posted on Mar 29, 2009
Not sure what to do in a situation like this but I'll post this as a solution as we seem to have found it even if I didn't actually realise it was... Who knew :)
Posted on Jan 23, 2009
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Posted on Jan 02, 2017
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