Hp5020 alignment page not printing properly

[dkw5]

Having replaced empty black cartridge attempted to perform alignment as advised. Alignment page prints but top third of page is blank! Upon scanning printer reports alignment page not detected. Have powered printer down and back on. Have checked cartridge insertion and checked for obstructions cleaned cartridges etc. Problem still present. Any help appreciated!

[Nal_NR · Accepted solution]

Hi @dkw5,

Welcome to the HP Support Community. 

I'd like to help!

Reset the printer

Reset the printer to recover from printer errors or failures.

If your printer has a rechargeable battery, remove it.

With the printer turned on, disconnect the power cord from the printer.

Unplug the power cord from the power source.

Wait 60 seconds.

Reconnect the power cord to a wall outlet and to the printer.

NOTE:

HP recommends plugging the printer directly into a wall outlet.

Turn on the printer to complete the reset.

Click here for further assistance. 

You may also refer to the Print Quality-related issues. 

Hope this helps! Keep me posted for further assistance.
Please click “Accepted 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!