I just replaced my black ink and it is not working it is saying that unsupported cartridge.

Had the same issue, bought some cheap inks off the internet and the printer wouldn't accept them, bought the proper dell cartridge did a head clean and it worked ok.

The following may work: remove all the ink supplies. Remove the printhead and soak it for about 5 minutes in 0.5" of very hot water. Gently blot the printhead on a soft damp paper towel to remove the excess water, then replace in the printer and then reinstall the ink supplies.

defective cartdge , replace it

I have to ask this question of you, just to make sure this is not an issue. Are you using a factory new ink cartridge?
Please consider the following:
If you are using a refilled or third party cartridge that may well be your problem. Most manufacturers build logic into their products to prevent the use of “Other Equipment Manufactured” cartridges as well as re-filled cartridges.
They do this to prevent problems from contaminated inks causing problems with print quality or damaging the physical printhead.
If you are using factory new cartridges, then please call the manufacturers Technical Support for assistance with the warranty on the cartridges
Don

Ink cartriges have chips in them, if the printer does so many prints without getting the "I've had a new Original Cart fitted" it will stop untill,you give it one, regardless if there ink or not

Im afraid it doesn't care that you only need to use the colour cartridge, it is designed to cost you money and make money for lexmark not refillers.

Welcome to our modern world, manufactures make the ink hard to recycle by incorperation of expensive chips that makes refillers, unable to make a easy dollar, because if that want to make cartridges that work they must also fit the expensive chip.

All empty cartridges have a little ink left in them because getting air in ink lines is not a thing we want.

If it is not a Dell ink cartridge, it won't work. Dell has it to where you have to buy their cartridge.

Be sure you have snap the ink cartridge tight, and check the expiration date of the ink cartridge.

Check to make sure that all of the packing "tape" has been removed correctly on the replacement cartridge and that the cartridge is seated correctly and the circuit contacts make good contact with the contacts within the carriage assembly and that nothing is obstructing it. Possibly a defective cartridge..

Try replacing the cartridge with a new Dell ink cartridge, the refill may have gone bad.

I have an X5495 Lexmark and have recently been getting this **** "unsupported cartridge" rubbish. OS is XP SP2.

My history with this printer has been:
-when new, the printer worked fine until I needed to replace the original ink tanks. I refilled them, but could not get the printer functional again....nil print at all. After much frustration, I was informed by a little birdie that the cartridges that originally come with the printer will not work if refilled. Great. They are one use only.
-replaced with genuine high yield tanks. Then worked fine. Refilled once, possibly twice with suitable non genuine ink. Still working fine.
-once black ink tank ran low this time, refilled it and symptoms of no print from Word docs, not all parts of a web page would print. Surprisingly, photos off hard disc print ok.(??????)
-replaced black with genuine tank and colour with remanufactured tank. Error message of "unsupported tank". Now no print at all.
-left new genuine black cartridge in and refitted genuine colour cartridge that I have previously refilled.
-all print now ok.....finally.

Maybe they have a copy limit or the integrated print head in the black has crapped itself????????

During this process, I have uninstalled and reinstalled the driver several times.
I have found that it has to be COMPLETELY uninstalled. Using the Lexmark uninstall function does not remove all parts of the software (Lexmark toolbar for one). If the software is not completely uninstalled, you will get a spurious unrelated and rubbish pop up that installation cannot continue because of "insufficient processor speed" with a spurious set of numbers after it. This message bears no relation to the solution.

I have found that you need to search and delete ALL Lexmark files that you can find after the uninstall. I have also deleted entries from registry.....1 entry only from memory (be CAREFUL with registry). Then reboot system.

The driver should then reinstall correctly and fully.

Why do they make it so damn hard? Don't think I'll buy a Lexmark next time.......