MFP M527c, f and z models only.
Open the stapler door.
Pull the staple cartridge straight out of the printer to remove it.
Unpack the replacement part from the packaging.
http://www8.hp.com/us/en/hp-information/environment/product-recycling.html
HP recommends responsible disposal of the defective part.
Push the staple cartridge straight into the printer to install it.
Close the stapler door.