problem with log into epson tm-m30 printer

Solution 1:

If someone has changed the credentials on the printer, then really the only thing you can do is reset it to factory defaults.

• 1 After running a self test, hold down the Feed button for at least one second to enter the Mode selection. The Mode selection guidance is printed, and the Paper LED flashes.

• 2 Briefly press the Feed button five times (less than one second), hold it down for at least one second to enter the Interface Setup mode. The guidance is printed.

• 3 After briefly pressing the Feed button (less than one second) for the number of times shown in the print result, hold down the button for more than one second to select the setting items.

Initialize: Select [Wi-Fi & Ethernet Setup] or [Bluetooth Setup] and select [Initialize] to initialize the communication settings. The printer is reset and restarted.

You don't need to set a static IP address on the printer to configure it, it will have one by default after the reset. Put your laptop on the same subnet as the printer and you will be able to communicate with it. By default the printer will have the IP address 192.168.192.168 if it can't reach a DHCP server.