Dell_user_XPS8500,
Not being able to copy a document under the glass, tels me there is an issue with the Dell Series 15 ink cartridge(s)
You are using Dell Series 15 ink cartridges, correct?
If you unplug the printer from the wall and remove the power brick for 60 seconds, this will reset any error messages the printer has. I would then plug everything back in.
Power on the printer.
Open the printer(with the power on) and take out the Dell Series 15 black cartridge and then reseat it. I would then take out the color Dell Series 15 ink cartridge and reseat it. Now close the printer and it will print an alignment page.
Any error messages?
black cartridge = black side(left side) color cartridge = color side(right side)
photo cartridge = black side(left side) color cartridge = color side(right side)
Dell Series 15 ink cartridges have a sensor in them that cannot be reset. Article on refilling Dell ink cartridges.
Dell Series 15 ink cartridges can be purchased at Staples, Walmart or Dell's Website.
It's possible to get a Dell Series 15 ink cartridge with a bad sensor. I would take these back to the place of purchase for a replacement or a refund.
Rick