The “No Toner” error on printers, especially Brother models, typically means the printer is not detecting the toner cartridge properly. This can happen because the toner cartridge is not correctly installed, the toner chip is missing or dead, the printer probe that detects the chip is faulty, or there is poor contact between the chip and the printer[1][2][3].

To fix a “No Toner” error:

– Open the printer front cover and remove the drum unit and toner cartridges.
– Remove any packing materials like orange plastics or blue tape.
– Shake the toner cartridges gently to redistribute the toner inside.
– Reinstall the toner cartridges carefully, ensuring they match the color codes and click into place.
– Check if the toner cartridge has a chip with its own battery; if so, replace the chip’s battery if it is low or dead.
– Clean contacts on both toner cartridges and printer areas where the chip contacts may be.
– If the problem persists, the issue might be a defective chip or probe; replacing the cartridge or contacting support may be necessary[1][2][3][4].

Brother printers from 2017 onwards use IC chips on toner cartridges to authenticate them; if the printer cannot read the chip due to damage, poor contact, or missing chips, it reports “No Toner,” even if toner powder is physically present[2][3].

In summary, “No Toner” errors usually indicate a problem with cartridge installation or the toner chip recognition system, not with the toner powder level itself. Troubleshooting involves checking installation, chip condition, and cleaning contacts[1][2][3].