I wrote in that I had the same problem. I was fortunate to get someone from Canon (after much trouble) to give me an answer. This worked for me. Disable the LAN DRX setting. This is under device setup, device settings, LAN setting, other settings. D...
I, too. Have this problem with mx723. I tried emailing Canon and no matter how I try to explain it, they keep thinking the printer is no longer recognized on the network. As someone else stated, the printer is not releasing the computer or vice versa...
