This section explains how to replace toner bottles before they become empty.
"Toner Cartridge is almost empty." will appear when it nears the time to replace a component.
If the toner bottle is replaced before this message appears, the remaining toner level is not updated and the remaining toner level before replacing the toner bottle appears instead.
If the toner bottle is replaced after this message appears, the message will appear at the correct time according to the actual remaining toner level.
If the toner has run out and the cover is open, close the cover and check the status.