HP (Hewlett-Packard) LaserJet 4V Printer User Manual


 
Line at Edge of Paper
If a line appears on the edge of the paper after printing about 10,000 pages
(usually the right side and running the direction that the paper travels through
the printer), the drum in your toner cartridge is wearing out. The line will grow
wider, with cross-hatching. Replace the toner cartridge. Shaking the cartridge
will not relieve the problem.
Solving Printer Problems 8-21