the reason:
1. If the ink cartridge is not installed properly or the cartridge is not returned to the sensor dome, it needs to be reinstalled or used to help reset the shrapnel;
2. The metal sheet in the print head is aging or loose and causes poor contact. It is recommended to send the repair station for maintenance;
3. If the ink cartridge is not replaced according to the prescribed procedure, the ink cartridge must be replaced according to the prescribed procedure.
4. If it still cannot be resolved, it is most likely that the printer's electronic memory is faulty. You need to delete the printer driver, reinstall the driver, and remove the cartridge again. Reinstall the cartridge as described above.
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