If you have replaced your home router, updated your Wi-Fi password, or the ET-2400 keeps dropping off your network, you need to reset the network interface to its factory default state. the printer.
Note: Always make sure your physical tanks are actually filled before performing this reset. Running the printer completely bone-dry can introduce air pockets into the ink tubes, permanently damaging the printhead. 6. Proactive Tips to Avoid Frequent Printer Resets
This reset does NOT fix ink errors. It clears the Wi-Fi, admin passwords, and language settings. Use this if you are giving the printer away or cannot connect to your new router.
The official method from the Epson ET-2400 user manual is straightforward: