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Blurred printing two out of every three lines

HP Deskjet 3637
Microsoft Windows 10 (32-bit)



My HP Deskjet 3637 prints blurred lines on two out of every three lines. The Third line is nice and clear, but the two in between are blurred every time. One is half blurred, and the second is completely blurred. I have tried cleaning the head, aligning the print, and removing the cartridges and cleaning around the ink nozzles as per the instructions on the HP website, all to no avail. I have run the HP print and scan doctor, and that says everything is fine!

The cartridges are fairly new, and worked fine when first put in.

Any ideas would be gratefully received!


Many Thanks,



HP Support Agent
HP Support Agent
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Message 2 of 2
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Blurred printing two out of every three lines

Hi @Madmel


Welcome to the HP Support Community. I'd be happy to assist you


Due to the current global COVID-19 situation, we're seeing an influx of customers coming in for support. We appreciate your patience.


If you have already performed the steps from the document Fixing Poor Print Quality 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! Keep me posted. 


Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.

Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping!


Have a great day! 

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