HP

[paddycake72]

My HP Office Jet Pro 6878 has new ink but still is only printing color, no black

[Raj_05]

Hi @paddycake72,

Welcome to HP Support Community.

Thank you for posting your query, I will be glad to help you.

It sounds like there might be a clogging issue or an air bubble affecting the black ink cartridge. Here are some steps you can try to resolve the issue.

• Clean the Print Head: Use the printer's software to run a print head cleaning cycle. This can often resolve minor clogs that prevent the black ink from flowing properly.
• Check Ink Levels: Ensure that the black ink cartridge is properly inserted and has sufficient ink.
• Manual Cleaning: If the print head cleaning doesn't work, you can manually clean the print head. This involves gently wiping the print head with a lint-free cloth dampened with distilled water. Be very careful not to damage the print head or contacts.
• Check for Air Bubbles: Sometimes, air bubbles can form in the ink cartridge or print head, preventing proper ink flow. You can gently tap the cartridge on a paper towel to encourage any bubbles to rise to the top.
• Replace the Cartridge: If cleaning doesn't work, the black ink cartridge might be defective or depleted. Try replacing it with a new one to see if that resolves the issue.
• Printer Reset: Sometimes, resetting the printer to its factory settings can resolve software-related issues that may be causing the problem.

If these steps don't resolve the issue, there may be a more significant hardware problem with the printer.

I hope this helps.

Take care and have a good day.

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Alden4

HP Support