I think I would uninstall the printer, then shut everything down - computer, printer, Lan, everything.
Then I would start by powering on the computer, checking to see if the printer is still installed.
If not, I'd power on the LAN, then the printer. Check to see what IP address the printer has on the printer's front panel.
Then type that address into your browser to see if it indeed is there. Confirm.
Then I would download the most recent version of software which is October 18, 2016:
http://h20564.www2.hp.com/hpsc/swd/public/readIndex?sp4ts.oid=11176681&swLangOid=8&swEnvOid=4060Then go ahead and install that.
Then install the Utility:
http://h20564.www2.hp.com/hpsc/swd/public/readIndex?sp4ts.oid=11176681&swLangOid=8&swEnvOid=4063I would not use USB, only LAN.
Once you have it installed, check to see what your printers/devices shows - has it correctly installed the driver?
Do a test print, and only 1 test print.
Then shut down the printer at the printer's front panel, then turn the on/off switch in back to off. Unplug the printer.
Wait a full minute, then plug the power back in and turn the on/off switch to on.
Go back to the printer and start printing.
If it prints correctly, then you're set. If it doesn't, do the printer restart procedure several times.
I'm quite certain it should take after the 2nd or third time.
Please let us know.
Good luck,
Mark