Not able to connect to my printer

Hi,

With an old HP network printer, if necessary, it is often worth checking whether a printer driver for another similar model can be used, or a generic PCL or PostScript driver. See also Add a network printer by its IP address in Add a printer on Mac - Apple Support.

The following post could perhaps be of interest in this context:

https://discussions.apple.com/thread/252041076?answerId=254424177022#254424177022

A question for HP don't you think.

Is it a LaserJet 4200, if so click on the link below,

https://support.hp.com/gb-en/drivers/selfservice/hp-laserjet-4200-printer-series/84028

I am on macOS Mojave and immediately get unable to fid drivers notice,

clicking on the operating system selector and selecting macOS only gives options

for macOS 8 and macOS 9 which are over 20 years old, the last updates for these were in 2005.

Have you been running this printer using a more modern OS, tell us which.

Interestingly though it does seem to be supported in this driver download,

https://support.apple.com/kb/DL1888?viewlocale=en_US&locale=en_US

Once download double-click to install.

You may also need to reset the printing system,

Reset the Mac printing system to solve a problem - Apple Support