If the cartridge has recently been installed, check that the seal has been removed. If the cartridge has been in the printer for some time it may just be running out of toner.
You can take the cartridge out of the printer and gently rock it to re-distribute the remaining toner, but it will need replacing in the near future (Pls Refer to our Installation Guide).
ASTA cartridges are remanufactured using good quality OEM shells so when inllstalling your re-manufactured cartridge you can be ensured of the exact same fit.
Yes, our Premium toner cartridges are equal to the OEM in print yield and density.