Samsung Xpress C480W prints color but not black

[benmja]

Hi,

I have a Samsung Xpres C480W which I purchased second hand. The waste toner cartridge was not empty, and the machine had a lot of dust inside. I have used a lot of time taking out parts and cleaning it.

Now the printer prints OK in yellow, magenta and cyan. But not BLACK. I have tested many things - printing status reports, black images, black shapes, and text. Nothing.

I have replaced the black toner with a new one. Same result.

Everything seems to work except the black.

Thank you so much for any suggestions!

Regards,
Bendik