On a Windows computer, having the Use Printer Offline option enabled can force your printer to be offline. To fix this, go to the Devices and Printers window in Windows Control Panel. Right-click on your Epson ET 3710 printer and select See what's printing. Select Printer and then deselect the Use Printer Offline checkbox. If this method does not help, go to the next step.
If there is any problem with the printer settings, go to the printer control panel and reset the settings to factory defaults. Press Home -> Setting -> Restore Default Setting -> Clear All Data and press the OK button.