Installaiton failedPlease check the model list if the cartridge can not be installed.
Please check whether the protection shield is removed or unopened,if the model is checked to be compatible.
Please contact the supplier is there is still abnormality.
LeakagePlease clean the cartridge surface if there is any toner on the surface when the package is opened.
The cartridge is normal if there is no toner leak after you shake the cartridge several times.(Tiny toner leak may happen in certain parts of the cartridge caused by toner aggregation caused by transportation)
Please contact the supplier is there is still toner leak after you shake the cartridge several times.
Please follow the above steps to check if the cartridge is usable.