I would say swap-out the cable as a good next step having had many cable failures over the years.
I've learned over the past few months with drivers for the 3880 and P900, you've got to uninstall the printer drivers then reinstall the drivers every time you do a system upgrade on the Mac. The symptom is that when you print and choose the proper profile for your printer/paper combo, the print is dark and muddy. Removing the printer and reinstalling it seems to fix the issue although you do have to redo your presets sometimes.
These problems seem to crop up more and more as I get older and keep the older printers going. The last time a few weeks ago it happened, I kept good notes so that I can fix the problem when I update again shortly. These little gotchas seem to keep popping up occasionally ;-)
I hope your problem gets easily solved with something as simple as a cable, we can hope!