Follow Stpes resolve The corona wires have become dirty. Clean the corona wires in the drum unit. ... The drum unit or the toner cartridge and drum unit assembly is not installed correctly. Reinstall the toner cartridge and drum unit assembly. ... If the issue still continues, the drum unit is at t...

Open your Norton device security product. In the main window, click Activate Now. Click Next. In the My service PIN field, type the PIN that is provided to you by your service provider. Click Activate. Type in a name for your computer, and then click Activate. Close the Activation Complete! There ar...