The third black cartridge to print about 300 pages long working right, was initially reported "little toner" shortly afterwards "no toner". The last pages had been completely smeared.
The scale showed that the cartridge almost 100 grams weighed more than a really empty, but I have not managed to make the printer work again.
Last hope before repair: an original cartridge.
And indeed, it printed again, and after about 50 pages and the printed image was properly again.
Seen in this light, the high price paid.