Someone posted the same problem a little while back, and I'm having it too. When I attempt a firmware update from the front panel, it says "A communication error occurred. Cannot check the firmware version."
I was able to update the firmware through my computer -- I had to dig deep in my spare parts box for an appropriate USB cable -- but I'd rather not have to do that every time since the computer is a desktop machine that lives upstairs and this printer is a rather bulky beast that lives downstairs.
I don't remember making any relevant changes to my router's settings, but maybe I did and forgot?
My current firmware versions after the update:
The issue you are describing would point to a network communication issue. We would be happy to assist with the issue. To provide some feedback or some troubleshooting steps, we would need some additional information. If you could reply to this message with the information below, we can provide some assistance. For a more immediate resolution, you can contact support at 1-800-652-2666, our agents would be happy to help.
If you are unable to check or update the firmware via Wi-Fi and get a communication error, it would point to a weak connection or drop in network communication. If connected via wifi, I would suggest moving the printer closer to the router to get a better signal or you can try unplugging the router for 5 seconds and then trying the firmware update again once the network is back up.
If you have already power cycled the router and improved the signal strength, I would suggest contacting support over the phone at this point to see what might be causing the issue with the firmware update. Our agents would be happy to check the printer's network connection to see what might be causing the issue.