Hello whitehousechristine,
I am sorry you are having so much trouble with the 6515s you have received so far. Have you tried another power source to see if that helps?
I would recommend contacting the Support Department as this shouldn't be happening with a brand new device.
I hope someone can help - I'm on my 3rd brand new 6515dni - the first one wouldn't recognize the toner, the second one had a cracked flatbed glass. Now, this one seems to also have issues. I was able to get through the initial configuration and connected to my network and print to the machine via wifi. When I tried to set up scanning to the network, the touchscreen turns off suddenly and won't come back on unless I restart the machine. I can't scan, copy, etc. because I can't get to the controls on the screen. When I touch the power or home button, the machine beeps but there are no lights and no response. If I try to print, the print will go through but i can't do anything else. Help, please - ripping my hair out!