Black ink will not print

[rbko]

I printed a text document and the sheet came out blank.  I tried printing a card from Hallmark Card Studio and the black ink would not print.  Both HP cartridges were low so I replaced them with HP cartridges, but the same thing happened.  I ran the HP Print and Scan Doctor and cleaned the printer heads...nothing changed.  I printed the test page and only two of the three black rectangles printed. The darkest one did not print.  What can I do?

[Jeet_singh · Accepted solution]

Hi @rbko,

Thank you for showing your interest in HP Support Forums. It is a great place to find the help you need, from other users, HP experts, and other support personnel. I came across your post and wanted to assist you. I understand you are having printing issues on your HP Envy 7640 printer. I'll be really glad to help you with this,

To provide you with an accurate solution, I'll need a few more details:

Have you made any changes on the printer before the issue started?

Are you able to make a copy from the printer?

Have you tried to use one cartridge at a time?

In the meantime, let's try these steps here:

Please make sure that the printer is connected directly to the wall outlet and not to the surge protector.

Remove all the ink cartridges and then try to perform a hard reset on the printer.

With the printer turned on, disconnect the power cord from the rear of the printer and also unplug the power cord from the wall outlet.

Remove USB cable, if present.

Wait for 2-3 minutes, press and hold the power button on your printer for about 30 seconds to remove any additional charge.

Now plug back the power cable straight to a wall outlet without any surge protector or an extension cord and then plug back the power cord to the printer.

Turn on the printer and wait till warm-up period finishes and the printer is idle.

Now insert the ink cartridges and then try to print a test page and check if it works.

For more details, please follow the steps suggested in the support document for - Colour or Black Ink Not Printing

Next thing, try to use one cartridge at a time and check if it works.

Please respond to this post with the result of your troubleshooting. I look forward to hearing from you. 

If you wish to help others looking for the same solution as you've found, mark the post as Accepted Solution.

If you wish to show appreciation for my effort, please click the Thumbs up icon at the bottom of my comment.

And I Hope you have a good day, Ahead.

Regards,

[rbko]

Thank you very much.  I did the unplug routine 3 times.  After each routine I ran the align cartridge and clean cartridge processes.  I then put the black cartridge in only and aligned and cleaned it seperately.  I then put the color cartridge back in and aligned the the printheads and the print quality is back to where it should be.  It went from no black to solid black.  Thanks again! 

[Jeet_singh]

Hi @rbko,

Thank you for the update,

I appreciate your time and efforts,

I'm glad you found the solution you were looking for.

Thanks for taking the time to let the community know about the solution

You've been great to work with and it has been a genuine pleasure interacting with you.

I hope both you and your product works great and remain healthy for a long time 😉

To simply say thanks for my efforts to assist you, please click the "Thumbs Up" button to give me a Kudos.

And accept this as the solution to help others find your post helpful.

Take care now and do have a fabulous week ahead. 🙂

Regards,