Hi, thank you for contacting JustAnswer.com. My name is Russell. I think that you deserve some sort of answer to your question, even if it is a bit late.
When a router in a local network is changed, it often has a new base address. (The base address of the router is seen, on any computer connected to it, as the 'Default Gateway' address listed by the
command, when that command is executed in a Command Prompt window.)
If the base address of the new router is different from what the old router had, then the printer configured to be printable to, through that router or on that local network's old address, will become inaccessible.
The cure is to either set the router to the old router's base address, or to set the printer appropriately to the new router, and reinsall the printer's drivers on every computer... which is a lot more work than the former possible fix, obviously.
I hope you found the easier solution. Thank you for bringing your question to us here at JustAnswer.com.