Your Epson Printer won’t scan commonly due to a variety of issues. There is a possibility that your scanner must be switched off. This, ensure that the scanner is switched on. Switch off your system and scanner. Now, check whether the USB cord connecting them is safe. Check whether your PC is in sleep mode. If yes, restart the printer. This may do the trick and your printer will start working again. If you have updated your operating system, then reinstall the Epson Scan software. The scanner doesn't always operate correctly due to software sometimes. You should uninstall the scanning software and then reinstall it again.