the middle of the page is not printed,

[Marc333]

HP LASERJET MFP M28W

My printer does not print the middle of the page, long vertical blank

[Nal_NR]

Hi @Marc333,

Welcome to the HP Support Community. 

I'd be happy to help you! 

I understand that you are facing issues with print quality. 

Try updating firmware by selecting your current OS. Click here

Solution one: Print a Network Configuration Page

A printed page from the printer, and not from a computer program, can help diagnose a printer problem. Follow these steps to print a Network Configuration Page.

Go to the HP Customer Care Support page.

In the Find my product and get support search box, type your printer name or number (i.e., HP LaserJet 1022 or HP LaserJet M1120), and then click Go.

If prompted, select your printer model from the list. The printer support page displays.

In the Questions or keywords search box, type Network Configuration Page, and then press Enter.

Click the document to open it, and then follow the instructions to print a Network Configuration Page.

NOTE:

You might also find instructions in the printer's user guide. From the printer support page, click User guides, and then click the user guide to open and view it.

If the Network Configuration Page prints normally, but you are still experiencing print quality issues, go to the solution to check the USB connection.

If the Network Configuration Page contains garbled, illogical text, or is missing text or graphics, continue to the next solution.

Click here for the remaining steps. 

Hope this helps! Keep me posted for further assistance.
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