I have purchased HP envy 4520 wireless printer for printing the documents wirelessly. HP envy 4520 printer is very efficient, quick and excellent in the printing performance, so I have decided to work on it. From a few days, my wireless printer is not working properly. It is showing some technical faults, so I want to repair it. I have checked out all technical things into the printer, but I have got nothing into the printing device. It is very intricate technical error for me, so I look for expert’s help. Anyone can guide me to solve HP envy 4520 wireless printer not working problem.