Hi Bruce,
I assume from what you have written that in the past you have run the 3880 on a USB Cable. Perhaps your surroundings have changed and now your printer is farther from your computer station. There's a rather old "rule" that one should not attempt to run a printer on a USB cable longer than 10'. However, from 2010 'til 2017 I had operated an Epson 9900 on a 45' run of USB cables with absolutely no issues at all. I now use the same 3 cables for the P7000, and again, no problem. Visit your local computer store and ask for Active USB Extension Cables. They usually come in 5M (15') lengths and you can chain up to 6 of these cables apparently. If you do need more than 45', make sure they can be returned if they don't work for your application.
Hope this helps Bruce,
Gary