check whether it is still at the same ip address that it was.
delete the printer from the devices and printers section
then click add printer and network printer
see if it finds the printer
if it does hitting next next next etc should re install it
and it should work
if on the other hand it is not found in the scan than the printer is not communicating with the router. check the cable and check the settings on the printer make sure it is set up for hard wired ethernet. or try wifi
you might also try rebooting the router.
in any case i can help you more tomorrow Wednesday afternoon. If you tell me exactly what happened when you tried the above especially the windows scan of the network.
I can even get you my phone number and log in remotely to fix it with you.