It is possible that the seal or a significant portion of the seal is still in place on the yellow cartridge. It is also possible that the laser scanner window (transparent slot in the back wall or roof of the cartridge chamber) is covered or coated with toner.
Testimonial: "I have put new original HP toner in and it still has the same results, several different cartridges."
SOURCE: three broken horizontal lines across all printed pages
I can see a couple of possibilities here. One: The cleaning blade for the drum could be damaged and not all of the toner is being cleaned off of the drum between pages. Two: The drum could be damaged and the damaged parts of the drum are not accepting the changes generated by the laser. I don't think you have a fuser problem because if it were that, the toner would probably smear when you touch it. Typically, I would say it is the toner cartridge but you replaced it and still got the same problem. I would inspect the drum cleaning blade first. That would be the most cost effective first option. Hope this helps. Good luck.
SOURCE: Black Toner replaced
This is what happens when you also do a refil, but the advice from the refill people is to ignore the low ink warning as it will print happily until the point that the next message comes up which is that you need to replace the toner. Effectively this is to do with teh chip in the cartridge thaht tells the printer that it is low and unless you buy a new cartridge you will still get the low toner message but it is safe to ignore.
SOURCE: diagonal lines on print
Hi,
Follow these steps.
Print Quality Problems on 3010cn.
Reset the NVRAM On the 3010cn
To reset the NVRAM, perform the following steps:
appears, and then press the
(down arrow) button on the printer until Configure
(right arrow) button on the printer or 
(Set) button.
on the printer until Maintenance on the printer or .
until Init NVRAM appears, and then press or .Initializing and Restart Printer will appear. button. button. button. On the LCD, Processing appears and the test page is printed. button. button. button. The test print will print. button. button. The test print will print. button. button. The test print will print. button. button. The test print will print.
SOURCE: Color Streaks down length of page
This is a laser printer, neither a copier nor a multifunction unit, therefore it has no glass. At least, I cannot find any glass in it.
I finally had an authorized Ricoh repair center examine it and found streaks on the black unit that pulls out of the right side (I forget the part's name, <$90). We replaced it and things are better but streaks of color remain. They suggested replacing the color one (about $400) but the cost is prohibitive right now, so I'll live with those streaks.
On a related note, I remain unimpressed with this printer's quality and inconsistency. For example, greys often print in pink; nothing has ever resolved this. I refuse to put any more money into it. When I can afford to do so, it will be replaced, probably by a Xerox Phaser.
SOURCE: Pages full of toner / toner streaking
First off, this is a comment from a random person who may or may not know ALOT about these printers and toner/printer design in general. All toners are not designed to the same specification. Toner is a combination of plastic "pigment" and iron like shavings to make it magentically attracted to the electrical charges within the unit. Different toners conform to different grades and mainly size of the particles within the blend. The manufacturer doesnt only recommend that you use their toner to make them money, yes of course it makes money, but its because when the unit is designed it is designed to use a certain grade of toner, trust me if you put the non-branded toner vs the branded toner under a microscope you would see quite a difference. Often the non-branded toner is much larger in particle size (obviousely because its cheaper to make at this spec). This causes a variety of issues from excess toner not being cleaned off of developer rollers, IDT rollers, or clogging of toner dispenser tubes in the unit and the micro filters contained at the toner dispenser assy and developer assys. Also as for the issue not changing when switching to dell branded toner - the dispenser tubes within this unit contain up to 500-1000 pages worth of toner, making no change in toner you make immediately visible. Also depending on the damage caused by the previous toner, it may not be able to be fixed until all the components in between the toner and final delivery (drum cart) are replaced. In this case more than likely the toner dispenser assy, all developer assy's, and drum cartridge need to be replaced, and than be sure to stick with factory branded toner :)
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