Try firmware update on the the printer, reset the router to factory default(Firmware update?), reinstall the printer-drivers.
Is the correct printer chosen/set as default on the list shown when you try to print something?
But what i think might be the case is that you chose that the network was a "public network" instead of "home network". Meaning if you have set the WiFi as a public network on the laptop you can't view any devices on the network.
Check if it's set as public, if it is.. Then change it
paddytokey reacted to Fredrikmikael in Can't find Wifi printer with laptop