Resolving the Epson WorkForce WF-3640 error code 0xE5 involves several steps. Begin by turning off the printer and unplugging it for at least 10 minutes to reset the internal components. Afterward, inspect for any paper jams or foreign objects within the printer. Restart the device and check if the error persists. If the issue continues, a firmware update may be necessary. Download the latest firmware from the official Epson support website and follow the installation instructions.