I was trying everything that your HP forums provides. I've installed PCL 5 and 6, together and separately - didn't work. Updated originate drivers - didn't work. Updated firmware - didn't work. That error occurs only on this printer, the other one in my branch works perfectly but it's different brand. It totally blocks my branch, it used to work flawlessly for a period of 2 years. I was restarting computer and printer each time I changed / updated the drivers and I ran out of ideas. I need an urgent help. I think it may be the software fault. It also prints Error: IllegalTag sometimes, or just random(?) letters at the top of the sheet like S S S A S R etc. Getting rid of the printer is not an option I need a solution to fix this.