Epson WF-3720 Series User Manual page 263

LCD screen message
Paper Setup Auto Display is set to
Off. Some features may not be
available. For details, see your
documentation.
No dial tone is detected.
The combination of the IP address
and the subnet mask is invalid. See
your documentation for more details
To use cloud services, update the
root certificate from the Epson Web
Config utility
Check that the printer driver is
installed on the computer and that
the port settings for the printer are
correct.
Check that the printer driver is
installed on the computer and that
the USB port settings for the printer
are correct.
Recovery mode
Condition/solution
AirPrint is not available when the Paper Setup Auto Display
setting is disabled. Change the Paper Setup Auto Display
setting to On.
Make sure the phone cable is connected correctly and the
phone line works. If you connected the product to a PBX (Private
Branch Exchange) phone line or Terminal Adapter, change the
Line Type setting to PBX. If you still cannot send a fax, turn off
the Dial Tone Detection setting. (Turning off the Dial Tone
Detection setting may cause the product to drop the first digit of
a fax number.)
There is a problem with the network connection to your product.
Set up your product on the network again.
Access the Web Config utility and update the cloud service root
certificate.
Make sure the printer port is correctly configured. In Windows,
make sure the port is set to a USBXXX setting for a USB
connection or EpsonNet Print Port for a network connection.
An error has occurred during firmware updating. Connect your
product using a USB cable and try downloading the Firmware
Update from the Epson support site. If you still need help,
contact Epson for support.
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