I have a major problem with my 4600dn. After installing a toner cartridge it goes from full to empty in the toner supplies window in a matter of a few short weeks, even though they are hardly used. I then have to bypass the empty message in the diagnostics mode, but when I have two or more "empty cartridges" I cannot bypass at all and, thus, cannot print.
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Re: False Toner message
Are you using genuine HP toners? If not HP puts a chip on there cartridges that tells the machine it is a new cartridge. Some generic toners do not replace this chip therefor giving you this false message.
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If you are not using original manufacturer's replacement toner cartridges, this could be your problem, and it will not resolve. The printer and cartridge will not "talk" to each other, therefore giving you a false reading. If this is the case, you should still be able to print normally, but you will not know when you run out of ink until you actually run out, akin to a broken gas gauge in a car.
Does your toner cart have any little clear plastic windows? HP printers shine a light through this window to ***** toner level. Cover one of the windows with tape & the printer will think the cart is full.
To check the toner level, there is a little clear window on each cartridge you can use for this purpose. Hold the cartridge vertically. If you see toner in the window, it is more than half full (or less than half empty, ha!). If not, slowly tilt the cartridge toward the side with the window. Essentially, how far you tilt it before you see toner determines how far below half full it is. If you pass a 45 degree angle before the toner appears in the window, it is nearing empty and must be replaced or refilled (yes, refilling is an option).
If you do have to replace or refill, don't forget to empty the waste toner bottle (responsibly, of course). By the time you run low on toner in one of your cartridges, the waste toner bottle will likely be nearing capacity.
The waste toner cartridge has a transparent extrusion on the bottom, which fills with toner when the cartridge is full, but also if it is half full and shaken so that toner falls into this extrusion. If this happens, the only way to remove the toner is to open the cartridge by removing the tape, taking the two halves apart and shaking/blowing/hoovering it empty. You can stick them together again with ordinary sellotape.
I am not certain this procedure will work with your model, but it's worth a try:
1. Turn machine on while pushing and holding the TWO up/down menu buttons at same time.
2. Menu window will show "OKI USER"
3. Scroll to " Engine Dialog Mode" is indicated. Push Enter button.
4. "Diagnostic Mode xx.xx.xx S-Mode is indicated.
5. Scroll to "NV-Ram initial" is indicated. Push ENTER.
6. Window shows "NV-Ram- Initial Table 1".
7. Push ONLINE and ENTER Buttons simultaneously and HOLD for 10 seconds after you see "Executing Reset" appear in menu window.
8. Restart printer.
All toner, drum, fuser and transfer figures return to 100\%.
this messages referes to the waste toner being full or not installed.
Manufactures try to stop you from emptying the container by having a small "window" that the printer looks through, when you empty the toner there will still be some toner on this window, so the printer will still believe that it is full.
a way around this is to wash the container out with water (do not use hot water as this will melt the toner). i also wouldn't recommend pouring the water & toner down the sink as this could be breaking local laws.
The waste toner is collected inside the drum cartridge. It can be emptied by removing the drum cartridge assy and opening the opaque window and emptying into a large bag. The lines on your copies are probably a symptom of the drum being worn out, so replacement is probably a better option. The drum is good for 60,000 copies.
Behind the little container for the waste toner there is a sensor that senses whether the toner basket is full or not. If the sensor itself is dirty, it can give a false reading. First try cleaning out the area under the container to see if the switch works. Also make sure the container is clean, because the sensor works by sight, so if it looks full because it's dirty, it will give a false reading. I have heard of people disabling that sensor in various ways, but that can get dangerous to the printer. I can't recall the details on that exact model, but I believe there is a diagnostic of some sort that can test that sensor to make sure it works right to begin with.