I am having the same problem using Windows Vista.  Does anyone have idea how to fix this?

There are some factors that cause printers to appear offline. Here are some of the reasons that can cause this problem:

• The printer has been set to “sleep” or “power save” mode.
  
• Drivers are not updated or not compatible with your system.
  

Usually, uninstalling and then reinstalling the software can help in solving this problem.

I am having the same exact problem.  One thing I noticed is if I turn the printer OFF (via the rocker switch at front/bottom/right), I can then print again for a while longer...

It would appear the printer is not fully recovering from its power down/sleep state.

How do I resolve this problem?  This printer is completely unreliable otherwise.  Does anyone have any solution?

I am having the same problem, too.  Drivers updated, uninstalled, reinstalled.  This is extraordinarily frustrating.

I have the same problem. The Printer is CLEARLY online,  ready, full of toner and even the Document Hub reports it as ready for action. Yet the Applications (MS Publisher in this case) sees it as offline.

COME ON DELL THIS IS A KNOWN ISSUE SORT IT OUT.

This is not an solution!

• I'd used the latest drivers - you'd offered at DELL support Website
  ... and "yapp" ...
• the printer is at "sleep" mode
  - sometimes, as it normal! Because "sleep mode" is not a fault - it has to be an Basic feature, where the drivers management has to handle it
  
  
• the printer is connected by a wireless network - (as it normal too!)
• used a normal IP6 address, also tested at IP4
• at the router PNP forwarding enabled too
• and it makes no difference between firewall on or of

Did you have ANY OTHER advice - maybe that may not originate from my 10 year old son?

Where or How can i set that this damned printer are wake up, if a normal print are spooled?

... and PLEASE:
don't advise that my son can wake him up, each time - don't do that ;-)

The problem I have is that the LAN connection goes offline. I cannot ping it or get to it any way. And yet, the USB connection is working, so the printer is alive, including the scanner. The printer has to be power cycled to get the LAN connection back. This has only started to happen in the past month, and sometimes goes for a couple of days until it goes offline. I have tried every suggestion so far, and nothing has helped.

I have solved this issue (I am on win 10). Go to printer properties, ports, add port, standard TCP/IP port and add the printers IP (I didn't enter any additional information in the port text box. After I have verified that the printers IP shows as a port in my printer properties (and it checked), I am now able to print again!