Epson WF-3720-3723-3725 Error 0x7D9D Epson WF-3720-3723-3725 printers may encounter the error code 0x7D9D, which is displayed as “Additional cassette error.” This error typically occurs due to issues with the connector part or the main board of the optional cassette. In some cases, it may also indicate a failure of the printer’s main board. The optional…