Your Lexmark printer is designed to function best with genuine Lexmark supplies and parts. Use of third-party supplies or parts may affect the performance, reliability, or life of the printer and its imaging components.
All life indicators are designed to function with Lexmark supplies and parts, and may deliver unpredictable results if third-party supplies or parts are used. Imaging component usage beyond the intended life may damage your Lexmark printer or associated components.
Warning—Potential Damage: Use of third-party supplies or parts can affect warranty coverage. Damage caused by the use of third-party supplies or parts may not be covered by the warranty.
To accept any and all of these risks, and to proceed with the use of non-genuine supplies or parts in your printer, touch and hold 
and the # on the printer control panel simultaneously for 15 seconds to clear the message and continue printing.
If you do not want to accept these risks, then remove the third-party supply or part from your printer, and then install a genuine Lexmark supply or part.
Note: For the list of supported supplies, see the “Ordering supplies” section of the User's Guide or visit www.lexmark.com.