Greetings all... I work for a small MSP and we currently sell the Canon MF753cdw. We have been seeing at a few offices this printer not being able to recover from sleep. We have disabled or extended every option for sleep or low power that we can find and even tried setting up a wakeup within the UI for 6am. When the staff arrives in the morning and they try to print, nothing happens. They tap the display and it just says "Waiting to print" in the bottom left corner. If they power cycle it starts working. Latest firmware is installed at first setup (most recent printer installed just a month or so ago), they are connected to the network via ethernet, and the latest drivers are installed on the PCs (all running up-to-date Win11 Pro). We use Ubiquiti network hardware so if we get in to our Unifi Dream Machine SE and look at the connected devices the Canon will not be there. It will appear after power cycling. The most recent troubleshooting step was to restart the small Unifi Flex Mini 5-port switch that its connected to (without restarting the printer itself) and that woke it up. The Flex Mini is a new addition too as it was installed to replace the original switch thinking that may have been a cause. Even when it won't print there is network activity (activity lights blinking) on both the printer side and the switch, and with the Flex Mini we can see that its connected... and yet nothing prints until something is done to the network connection. The only thing we have not tried is connecting via WiFi, but since we don't want to use WiFi its would be more of a curiosity than a solution. We have dozens of these in the field and its happening on just a few so I'm thinking some issue with internal NIC. Thoughts?
