I got given a Xerox WorkCentre 7835 from an office clear out. It took some real knocks in transport and was even laid down at points.
I have started it up and everything works fine appart from a problem with the drum cartidges, especially R1. There are black horizontal streaks on all photocopies (pics attached below). If I take the drum cartidges out, patiularly the back and cyan, then there are strips of ink stuck to the drum cartidge roll (see attached below).
Would a new drum cartidge fix the problem or am I better trying to break and sell in parts?