What should I do when error code C2-1410 or C2-1711 appears indicating a toner cartridge problem?

First, check that the toner cartridge is properly installed, then turn the machine off and back on. If the error persists, remove the cartridge and roll it five or six times to distribute the toner evenly, then reinstall it. If the problem continues, check whether the CRUM contact area is contaminated and clean it, or replace the toner cartridge with a new one.