Once the print unit is installed, remove the toner cartridge and shake it, then reinstall it back to the printer. Ensure that the toner cartridge is fully installed. Then close the front cover and power on the printer. Did the error message return?
Yes: If the error continues or returns later, replace the existing toner cartridge with a new one (if you have an extra cartridge in stock). Install the new toner cartridge and try printing again. If this corrects the issue, the old toner cartridge is defective and should be replaced. If not, continue with the steps below.
No: If the printer comes up to the ready state, try printing again. If it prints correctly, the error may have been an isolated incident. Continue normal printer use but pay close attention to it over the next few days to see if the error returns.
Note: Should the cartridge causing the error be completely or relatively new, check the yield/life rating on that toner cartridge through the EWS ( Embedded Web Server), if printer is connected to the network. If the yield/life rating on the cartridge is 6,000 pages or more, please contact Lexmark Technical Support before purchasing another toner cartridge. A problem may exist with a part on the printer and not with the toner cartridge.