Konica magicolor 4560DN Recently installed a new K cartridge, it is now printing with black speckles all over the page.

SOURCE: Magicolor 2400W print fades on right side of page

Have you tried cleaning the leans at the bottom of the printer? Open the cover, pull out the drum. Under it is a long, narrow piece of glass. If it gets dusty or toner accumulates on it, it will cause streaks in the printing. If this is dirty, take a clean, soft cloth and very gently wipe it off.

SOURCE: Toner Not Installed - After replace black

pleas clean toner chip reader, remove pc drum and all toners, under the toner rack there is a 3 pin chip reader, use pressure air to clean it. if the new BK toner is not original, it will say only not genuine toner but will print.

SOURCE: Konica Minolta magicolor 2430DL

Open the top cover. Remove the drum (part with long green handle). Below the drum you will see a strip of glass about 4-5 inches long. Take a cloth and wipe across the glass.

This will normally clear up any white lines in your print.

SOURCE: Magicolor 2430 DL vertical white blank stripes

remove PC drum and under that you can see laser glass, clean it and reinstall.

SOURCE: Konica Minolta Magicolor 2400W drum cartrige-how to replace?

Did you buy a whole new drum unit, or just change the cartridge? If so, the fuse may still be blown. Also, you may need to empty the spent toner out of the old cartridge.