I am supporting a user in a remote location who has an Epson WorkForce WF-3620. When she copies a document from the ADF, 2 vertical lines appear in the output. Debris or scratches in the ADF glass area seem the most likely cause since the lines do not appear when printing or when making a copy from the flatbed. But, when we scan a document using the ADF, there are no lines in the scanned file. So now I'm confused. Things I've had her try: clean and inspect the ADF glass and area, turn off unplug and plug the printer back in, printhead alignment, print nozzle check, new ink cartridge, print quality settings, manual rear feed paper vs using the paper tray, b&w & color copies. If it was debris or a scratch that she isn't noticing, why wouldn't the lines be there on the scanned file?
Thanks for any suggestions. Because I don't have direct access to the printer, I may not be able to provide feedback today on suggestions but I will asap. Thank you.