Samsung MultiXpress X740x Series User Manual page 257

Understanding display messages
b. When the toner cartridge has reached its end of life, the machine will stop printing. In this case,
you can choose to stop or continue printing from the SyncThru™Web Service. (Settings >
Machine Settings > System > Setup > Supplies Management > Toner Cartridge Stop) or
Samsung Easy Printer Manager (Device Settings > System > Supplies Management >
Toner Cartridge Stop). Turning off this option and continuing to print may damage the
device's system.
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10. Troubleshooting