Question about HP OfficeJet Pro k550 Printer

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HP K550 blak print failure

New printer. Prints color test OK. Printed 1st couple of print test pages streaky. Performed print head cleaning a couple of times. Color seems OK but won't print any black. Burst of thick ink blockage?? Removed black cartridge and cleaned surface around outlet of tank and re-inserted. How do you get print nozzles to park on left side for access?

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2 Answers

Re: HP K550 blak print failure

Press cancel button seven times, then it will clean itself.

Posted on Aug 29, 2008

Re: HP K550 blak print failure

Hold the far button on the right down for a minute and it will move the head over for access

Posted on Jan 11, 2008

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The printed pages are coming out really streaky. We have tried cleaning it, but no joy. Any advice?

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Had the same problem for weeks. Had to go thru all three levels of print head cleaning in the HP Toolbox menu to get black to work again. The head cleaning option on the printer itself was insufficient. Unless you've already gone thru all three cleaning levels this may be worth a try.

I walked thru the steps via the HP website FAQs for the 6180. Basically: Open the HP Solution Center, select Settings->Print Settings->Printer Toolbox, then click Clean the Printheads. After the first cleaning you'll be asked if the test page printed OK (mine didn't), click the Intermediate Cleaning box. You'll be asked again if the test page printed OK (mine did, but an independent MSWord print test was still streaky), click the clean again (sorry, don't remember what this one was called) for the third and deepest clean.

This last one worked for me, now it's back to normal printing. From what the HP website says I'm guessing that my black print head was dried up. That's a reasonable explanation for my situation, we had let the black sit dormant for a couple of weeks after the black cartridge ran out before we tried to install a replacement.

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HP K550 Prints Solid Gray Boxes Around Items

Hi drglass1 -

13,000 copies - that's awesome! although you've surely fixed this problem by now, for future refs or someone else searching for an answer... you might find this ref hp support helpful. happy printing!

Step 4: Clean the printheads
If the print quality is still bad, clean the printheads:
1. Make sure the printer is loaded with unused white paper.
2. Open the printer Toolbox and select the Printer Services tab.
3. Click Clean Printheads . A Clean Printheads window opens. Click Level 1 Clean .
4. Examine the page that prints for print defects.
a. If there are no defects, click Exit . Stop troubleshooting here .
b. If there are defects on the page, click Level 2 Clean . 5. Examine the page that prints for print defects.
a. If there are no defects, click Exit . Stop troubleshooting here .
b. If there are defects on the page, click Level 3 Clean . Note that Level 3 cleaning uses a lot of ink – it is not recommended if the cartridges are low on ink. - JW50

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2 Answers

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First with a clean soft cloth and a very small amt of alcohol clean off the underside of the printer carridge (the holder for the print heads) also where the print heads cleaning station is clean out any large masses of congealed link. Then remove the ink cartridge in question and with a pencil eraser gently rub the contacts and both the cartridge and the carridge replace the cartridge. Using the software tools for the printer clean and align the printheads ( if there is an option to do so). If this dosn't fix the problem try a different ink cartridge.

Sep 04, 2007 | HP OfficeJet Pro k550 Printer

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