The default administrator password for an Epson WorkForce Pro WF-C5790 is typically the printer's serial number Quick Fixes for the Admin Password
Navigate to > General Settings > System Administration > Security Settings > Admin Settings . Via Web Config : Open a web browser and enter the printer's IP address . The User Name is usually left blank or set to admin . Enter the Serial Number as the password. How to Reset a Forgotten Password epson wfc5790 admin password
Once you regain access:
This will erase all network configurations (Wi-Fi, IP address, email server settings, address book). The default administrator password for an Epson WorkForce
If the defaults don't work, someone likely changed it during setup. Here is how to dig deeper: Warning: This will reset the Language, Network Settings,
: Navigate to the printer's control panel.