We just bought an HP Officejet Pro x476dn for the office. It prints very fast but when it goes to sleep it will not wake up from any kind of network request from any Windows machine - Windows 7 or Windows XP. I have seen the post for the x576dw that was doing the same thing and have tried the "Print the first page faster" option but to no avail. I have a unix box that runs 24/7 and have scripted a cronjob to ping this printer every two hours. That seemed to work until this morning at around 10am the printer went back to sleep and I had to press the power button to wake it up again. Interestingly the unix box can still ping and get a response from the printer when it is sleeping but it won't "wake up" to work. The Windows machines cannot get a ping response during sleep mode.
Any suggestions?