How to fix a cartridge error on a printer:

1. Check to make sure all corresponding cartridges are properly inserted.
2. Verify toner levels of all cartridges and replace any low or empty ones.
3. Re-align the cartridges according to the manual provided by the printer manufacturer.
4. Use a damp cloth to clean the inside and outside of the printer.
5. Power down the printer and turn it back on to reset it.