If this did not solve the issue, try the next solution.

Solution 6: Automatically clean the print cartridges.

Solution: Clean the print cartridges.

For more information, see Automatically clean print cartridges” on page 34

Cause: The print cartridge nozzles needed to be cleaned.

If this did not solve the issue, try the next solution.

Solution 7: Contact HP support

Solution: Contact HP support for service.

Go to: www.hp.com/support.

If prompted, choose your country/region, and then click Contact HP for information on calling for technical support.

Cause: There was a problem with the printhead.

Solve a problem

Printouts are faded or have dull colors

Try the following solutions if the colors in your printout are not as bright and intense as you expected.

Solution 1: Make sure you are using genuine HP ink cartridges

Solution 2: Check the ink levels

Solution 3: Check the print settings

Solution 4: Check the paper type

Solution 5: Automatically clean the print cartridges.

Solution 6: Contact HP support

Solution 1: Make sure you are using genuine HP ink cartridges

Solution: Check to see if your ink cartridges are genuine HP ink cartridges.

HP recommends that you use genuine HP ink cartridges. Genuine HP ink cartridges are designed and tested with HP printers to help you easily produce great results, time after time.

NOTE: HP cannot guarantee the quality or reliability of non-HP supplies. Product service or repairs required as a result of using a non-HP supply will not be covered under warranty.

If you believe you purchased genuine HP ink cartridges, go to:

www.hp.com/go/anticounterfeit

Cause: Non-HP ink cartridges were being used.

Print quality troubleshooting

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HP 4400 - K4 manual Printouts are faded or have dull colors, Solution 6 Automatically clean the print cartridges