2600N- I have a solid cyan line down the left side of my page; 1.5 inches in. I wiped off the transport belt and the roller. rocked the cartridge back and forth. Still there.

after you have printed a few pages switch the machine off just as the paper leaves the fuser. then open the front cover and take a close look at the image transfer belt ( black plastic conveyor type belt)
use a torch shone accross the belt to better light the error- if you can see these Green/yellow/cyan lines on the belt then theres a good chance its coming from the toner units- ( also try print quality troubleshooting pages in the menus under diagnostics.look at the individual colour pages and look for any lines or Uneveness about the shaded colour) replace whichever toner is not printing correctly

This is most likely to be a toner cartridge issue. Either a leaking cartridge or one with damage on the roller of the drum. This is especially likely if it occurred just after changing a toner.

If however the transfer belt of this printer is easily accessible from your printer (I am not massively familiar with this model) it may be worthwhile wiping this down gently with a clean piece of kitchen tissue. This will look like a foot wide sheet of plastic wrapped around two rollers.

Lastly it could be a small roller with residual toner toner powder on it that is repeating down the page. This could be hard to track down, but much like the transfer belt this will get flushed out with continued printing anyway.

Hi,
Dots, Lines and smudges on the printouts are due to deteriorating cartridges and cleaning the green drum of the cartridge may help temporarily. Take out the cartridge and gently clean the roller/ green drum with a dry, soft, lint-free cloth wiping off the toner dots marks/ lines. (corresponding to the location where you are having a green line on the paper)
Also, make sure that the visible inside of the printer and the Black belt are clean and there is no spilled toner inside, which sometimes results in dots.
Moreover, streaks (thicker lines) and dots etc indicate faulty PCR Roller which is located behind the green drum inside the cartridge. Replace the Cartridge or get the PCR Roller changed by a professional.

Hope it helps! Good Luck! Thanks for using Fixya!
CreativeTECH

If the lines are predominatly one color such as yellow or cyan then you likely have a bad cartridge. If you recently replaced a cartridge that is the one I would check first. You can also just look at the drum of each cartridge (the green roller under the shutter). If there is a problem it will usually show on the drum as well. Cartridges are the biggest issue with these printers, particularily the poor quality of cheap remanufactured cartridges coming from Asia.

Again, this was actually HP Laserjet 3800. Problem solved by chatting with HP, and them having me go into a diagnosis mode that disabled cartridge check. Then, I removed the cyan cartridge, the dots went away. They then had me put the black into the cyan slot, and not dots appeared. I had backup toner on hand, swapped in a new cyan and magenta, and all was good. HP agreed to replace the cartridges.

Sounds like the new cartridge has been sitting around for too long. The solid lines are usually due to the drum being exposed to light for too long. The other reason could be the charger roller has been in contact with drum (in the cartridge) for a very long time and probably heat has a part in it as well. Try another cartridge.

Hi Trfilteau,
Print just magenta and you still the get yellow line? The yellow or black cartridge could be faulty.
Rgds
S88

Maybe your transfer belt is damaged. If u have an spare belt replace it for a test. Answer me if it dont work. Maybe i can get an support manual for u. I work in a HP partner company.

Good luck

Which color is this line? Try changing respective cartridge..

Have you tried contacting Okidata, 2000 Bishops Gate Blvd.,Mount Laurel, N.J. 08054-4620 Phone 1-800-OKI-DATA(654-3282) or visit www.okidata.com I have a similar problem with my OKIPAGE 10e. 1 inch wide black line, 2 inches from right hand side of page from top to bottom of 8 1/2 x 11 pages. I also cleaned black dust off green roller. Problem continues. Conclusion: I'm not an expert, but I think your wiping, checking, and cleaning, is a waste of time. I think your problem, and mine, is probably not a hardware problem, although I removed my black toner cartridge out of curiosity and perhaps re-installed it incorrectly. My guess is it's some sort of electronic problem, such as programming error, or software problem.