Unable to print . Message says ' Black cartirdge

maybe the cartridge is wrong, release it and clean the electrical contacts, put them again one by one, if notting happen, try this
Solution As the printer operates, it moves ink from the ink cartridges into a printhead reservoir. The printer does not deliver a message when an ink cartridge goes empty, because it still has ink in the reservoir. The printer continues printing until the ink level in the reservoir falls to a first trigger point - then a message appears advising the printer owner to Replace Cartridges Soon . At this point, other cartridges that are empty but have not reached the trigger point are also mentioned in the message, to save trips to the retailer. After the first trigger point, the printer can continue printing until ink levels in the reservoir reach a second trigger point. At the second trigger point there is only enough ink left to perform vital servicing tasks, and a new message appears, saying Ink Cartridges Empty . The options offered depend on the usable inks remaining. If no options are offered, the cartridges indicated must be replaced before printing can continue. The Ink Cartridges Empty options are described in the table below: Ink colors out Option Print mode possible All Cancel None Black

AND

Cyan, Magenta, or Yellow (any or all) Black only Continue with other colors Cyan/Magenta/Yellow mode (composite black)

Text and photo quality will differ from those printed when all colors are available Light Cyan or Light Magenta (either or both) Cyan, Magenta, or Yellow (any or all)

(Black still available) Print with black ink only Grayscale

hi,

Check your black ink cartidge. it may be empty.change it with new balck cartridge

this problem may also be due to cartidge holder .
clean cartrideg holder with moist cotton with petrol or some other cleaning liquid as nail polish remover. clean properly the cartirdge socket and mainly the contact point of cartridge socket

Hi,
This happend with some printer models that both cartirdge should be there for proper printing.in your case this may be due to that some printing you do may be in gray scale printing that type of printing use color cartridge for printing.thats why your color cartridge get consumed.so pls replace color cartridge or refiel it.

buy a new one

Usually there is more than one cartridge empty when you receive this kind of problem. Try opening the top cover and check if the display changes - it should change to specify one (or more) of the color cartridges as empty. That one(s) should be changed too.

Try this --
Cartridge Error 50C
Your print cartridge has shorted.

1. Power off your All-in-One and unplug it.
2. Plug in your All-in-One again and turn it on.
3. Uninstall and then reinstall your cartridges.
4. If this does not resolve the issue, try the troubleshooting steps for the other cartridge errors below.
   

Cartridge Error
Complete the following instructions:

1. Power off your All-in-One.
2. Use both hands to lift up the scanner unit until the scanner support holds it open.
3. Turn the All-in-One on. The print cartridge carrier moves and stops at the loading position, unless the All-in-One is busy.
4. Remove the color print cartridge.
5. Lower the scanner unit until it is completely closed.
6. If the error message reappears, replace the black print cartridge with a new print cartridge.
   If it does not repeat steps 1-3 and then go to step 7.
7. Reinstall the color cartridge and remove the black print cartridge.
8. Lower the scanner unit until it is completely closed.
9. If the error message occurs again, replace the color cartridge.
10. If an error message reappears, repeat steps 1-3 and reinstall both print cartridges.
11. Lower the scanner unit until it is completely closed.
12. If you receive the error message again, replace both cartridges

I replaced the old cartridge with a new one (Magenta) and it still asks me to replace it with a new cartridge.  
For 1 colour which is LOW, it stopped me completely from PRINTING or COPYING at all. 
Any clues how to fix this?

I put the original almost empty cartridge in again and printed one page. Then I took it out and put in the new one, after wiping the contacts with a piece of plain paper. it worked!

To fix this problem, you need to go back to the store where you bought the new cartridge, they need to replace it. You have to make sure that you have the same label of the cartridge and have them test it if possible so you don't have to go back if needed.

Hope this helps!