I have changed my printer cartridge, it is the correct cartridge for a Lexmark Z735 and it keeps throwing up a message "unsupported cartridge"

Try hard reset of printer electronics to restore factory defaults. Also reinstall the driver software and see if it now works fine. If still a no go try setting up printer with another computer. If same thing there then the printer definitely has a nasty issue. If so I do not think a repair would be cost effective.

Message signals that the right cartridge is not correctly recognized.
May have several causes:
1. Cartridge model is wrong (not a Lexmark color cartridge 33 or 35). In this case one must replace the cartridge with the printer.
2. You use the correct cartridge but it is not recognized correctly. Try to clean the contacts on the cartridge and the printer with a soft towel or cloth.
3. If after you have cleaned the contacts you received the same message means that the cartridge is defective and must replace it with a new one.

that can be happened with some problem of cartridge or cartridge holder.
if you can check the printer with your older empty cartridge, and you can see
the different error message with that , it says your printer is OK.
and have some problem with your cartridge.and need to replace it.

if you can see same message with your old and empty cartridge,
you can clean both of cartridge the connecting pads ( in printer cartridge holder and
back side of the cartridge ) using by IPA and check again.
if had corrosion or some ink swallowed problem , can be clean with that.

after that if you got same result, you need to check your cartridge with
another printer or your printer with another good cartridge.

If you receive an error message that tells you that you have an unsupported cartridge, then you need to remove the cartridge. After installing the appropriate type of ink cartridge you should no longer receive the error message and you can then perform a print test.
Instruction on how avoid unsupprted cartridge message.

1. Lift up the scanner unit (with the power on). The printer cartridge carrier will move to the top of the printer into the loading position.
   
2. Press down on the lever above the cartridge and then raise the cartridge lid. Remove the cartridge and make sure the cartridge supports no more than four colors (cyan, yellow, magenta and black) and a speed of 22 parts per notation.
   
3. Insert the compatible ink cartridge into the carrier and then lower the cartridge lid. Close the scanner unit, then make sure plain white paper is inserted into the paper loader.
   
4. Press the "OK" button on the control panel and the unsupported cartridge message should be gone. Press the "Select" button and a test alignment page will print.
   

Problem Unsupported Cartridge; Error: "Unsupported cartridge"; Incompatible cartridge error; Incompatible cartridge in the printer; Cartridge not recognized Solution What you will see
When a cartridge is inserted, an Unsupported Cartridge error message is displayed on the printer operator panel.
Affected printers
This issue affects printers sold exclusively in the Dixon Store Group (DSG) in Europe and in Circuit City in the U.S. NOTE: The cartridges for these printers are sold exclusively in these stores or on their websites.
Explanation
The printers listed in the table below are compatible with a #2 cartridge (in single cartridge printers) or a combination of #2 and #3 cartridges (in two-cartridge printers). They do not support the standard color 28A 35, and Mono 29A 34 ink cartridges. If the standard color 28A 35 or Mono 29A 34 ink cartridges are used in these printers, they will fail to print and the printer will post an Unsupported Cartridge error message.
Solution
Lexmark recommends using either a #2 cartridge for single-cartridge printers or a combination of #2 and #3 cartridges in two-cartridge printers.

Cartridge compatibility chart

NOTE: These printers are sold exclusively in the Dixon Store Group (DSG) in Europe and in Circuit City in the U.S. The cartridges for these printers are sold exclusively in these stores or on their websites.
Item Printer #2 Color Cartridge #3 Mono Cartridge #31 Photo Cartridge 1 Lexmark Z738 Yes ... ... 2 Lexmark Z1380 Yes Yes Yes 3 Lexmark Z1480 Yes Yes ... 4 Lexmark X2480 Yes ... ... 5 Lexmark X2580 Yes Yes Yes 6 Lexmark X3480 Yes ... ... 7 Lexmark X3580 Yes Yes Yes 8 Lexmark X4580 Yes Yes Yes

I have a lexmark X2470 all-in one printer.I am getting the messarge reading"unsupported cartridge" It is a 3rd party refill.

Follow this link to Lexmark's website. There is an extensive list of cartridges available for this printer and you gave no indication as to what you needed. http://www.lexmark.com/lexmark/product/home/725/0,6970,204816596_653399455_483733205_en,00.html?tabId=7 Don

Go to Lexmark on screen trouble shootin suit and change cartridge from there. make sure the golden contacts on cartridge and printer both are dried and clean.

plz try by reinstalling the drivers

Hi,

You can download here from Lexmark.

http://downloads.lexmark.com/cgi-perl/downloads.cgi?lxkprod=Lexmark+Z735+Color+Jetprinter

Just pick your operating system.