Visually inspect the toner cartridge
Remove the toner cartridge from the product.
Check the memory chip for damage.
Examine the surface of the green imaging drum on the toner cartridge.
Do not touch the imaging drum. Fingerprints on the imaging drum can cause print-
If you see any scratches, fingerprints, or other damage on the imaging drum, replace the toner
If the imaging drum does not appear to be damaged, rock the toner cartridge gently several times
and reinstall it. Print a few pages to see if the problem has resolved.