5520 wont print alignment sheet properley

[tk365]

my 5520 will print a quality page in colour but black blocks are  is faded  patchy ,tried 2 new non  hp cartridges, tried print head clean

when i do an alignment test it wont print any colours except blue ?? Im lost for an answer

[TEJ1602]

@tk365, Welcome to HP Support Community!

If you have already performed the steps from the document Black or Color Ink Not Printing, Other Print Quality Issues and the issue persists, it could be a hardware failure.

Please reach out to the HP Support in your region regarding the service options for your printer.

Hope this helps!

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