This happens once you have refreshed the iOS or changing to another gadget. Thus, it is normal in the event that you experience such issues on HP Envy 4500 AirPrint, HP Envy 7640 AirPrint, HP Deskjet 2540 AirPrint or other model numbers like HP p1102w AirPrint. The vast majority of the clients report to this issue where they see the HP AirPrint not working.   No AirPrint Printers Found...