Photosmart 6520 prints grey instead of black

[WAT4]

I'm having same issue as posted by HansQnA on 06-26-2018

My Photosmart 6520e started printing light gray instead of black (text and pictures).

I followed all the instructions on HP's support site ("black ink not printing etc.") - without success. I replaced the cartridge - Problem persisted - I went through all the troubleshooting again - No success. I went through a complete set of ink cartridges cleaning/aligning print heads, printing diagnostic pages, and cleaning again….

The Print Quality Diagnostic pages repeatedly shows the same pattern: The far right and middle bars of the black ink control pattern are light gray and dark gray, respectively (as expected). However, the far left bar is only a faint gray instead of black. All lines in the alignment patterns that are supposed to be black are also faint gray. All other color control patterns look perfect.

I followed the additional guidance you provided to HansQnA on 06-26-2018 03:41 PM to clean the black print cartridge vent - No luck - Same problem.

Your resolution provided to HansQnA on 06-28-2018 04:36 PM says, "Looks like this is a hardware issue."

PLEASE ADVISE.

WAT4

[Raj1788]

@WAT4

Welcome to the HP Community

Could you please help me with the operating system of the computer?

Is the copy working fine?

Meanwhile, follow this document: https://support.hp.com/in-en/product/hp-photosmart-6520-e-all-in-one-printer-series/5169038/document... for Black Ink Not Printing, Other Print Quality Issues

Keep me posted.

Have a great day!

Cheers:)

[WAT4]

Thanks for responding.

I did all the troubleshooting steps listed at

     https://support.hp.com/in-en/product/hp-photosmart-6520-e-all-in-one-printer-series/5169038/document...

My post discusses the results of steps 1, 2, and 3. The print preferences (step 4) are correct,

Answers to your quetions:

-- The computer operating system is Windows 7 Pro

-- Both printing and copying show the same results -- what should be black is instead light gray. All other colors (including shades of gray) are correct.

WAT4

[Raj1788]

@WAT4

If you have tried all the steps in this document and if the issue persists I would personally suggest you contact our HP Support for one on one interaction. 

Click here: https://support.hp.com/us-en/contact-hp?openCLC=true

Make sure you select the Country and Region.

Keep me posted on further assistance. Hope that helps!

Have a great day ahead!this is a hardware issue.