I replaced magnenta toner, now it still refuses to

Shake the cartridge vigorously to break up any clumped toner powder.

Clean the toner chip sensor house.

replace the image unit for that color and replace the toner cartridge with oem cartridge

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

You have to change the empty ink carthrige to be able to print on some models it is NOT required but on other models it has to be replaced to function properly becaus some printers make BLACK prints with all colours, (NO BLACK INK)....

Good luck!

There are few printers if any one toner ink is finished it does not print any more. So you must replace the toner or refill it then it will work.

Some printers will refuse to print _anything_, until you replace/refill _all_ of the empty toner cartridges. So, replace/refill.

Check online for refill instructions and where to buy the chip to replace on the drum, most of the drums today have little chips to replace that tell the printer when they are used up, even when there's still life in them.

I am a computer dealer in Perth and had to replace 5 of these printers out of my pocket. There is no fix and Samsung was very unfair and refused to replace these shoddy printers. Colour printed fine but black is faded.
It makes no difference if original toners or compatible ones are in use.
Samsung is very unprofessional in refusing to replace these printers with an inherent design fault.

In most cases cartridges have a special chip that remembers the toner cartridge serial number an amount of pages printed from it. This means, that even though there still might be some toner left in the cartridge, the chip's counter reaches it's predefined limit and informs printer, that the toner has run out. Just like that, suddenly.
It may also be the case, that the chip loses contact with the printer's electrical terminals - try reseating the cartridge in the printer. If that doesn't help, it's time to replace it I'm afraid.
Usually the printer will inform "toner low" for some time before it becomes "toner out" and refuses to print. If you get "toner low", then it's time to purchase a new cartridge to have it ready.

If you look your print heads have a colour symbol on them and cyan is a triangle. Magnenta is a square, yellow is a circle.