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LAN connected (not shared) printer does not see Windows 10 desktop
Hi - I'm finally giving up and asking for help. My networking knowledge consists of some networking for end users and basic business networks.
Computer: HP desktop, (LAN) Intel 82567V-2 Gigabit Network Connection, (WiFi) Qualcomm Atheros 802.11 a/b/g/n Dualband Wireless Network Module.
Router: TP-Link WR841N v9, Firmware: DD-WRT v3.0-r30880 std (11/14/16).
Printer: Canon MF4570dn connected to router by LAN
Problem description: The printer only sees the desktop (and will only work/interface) if the desktop's WiFi is enable/connected. If the WiFi is disabled and I am only using a wired LAN connection (to the router from the desktop), then the printer does not see the desktop. It doesn't matter if the printer is set to use "Auto IP" or if I use a static IP address - the symptoms are the same. It appears to be something related to the router as the previous routers (Netgear AC1700 and Airlink 101) did not have any problems. I have not had to change the network settings on the printer since for years.
I have been researching for a couple of months, but my phrasing of the searches always come up with "network printers" and the printer is not set up and has never been set up as a network printer.
Any advice will be greatly appreciated. If more information is needed I will provide it.
Thanks in advance for any assistance.