MFP M527c, f and z models only.
Open the stapler door.
Open the stapler door
Pull the staple cartridge straight out of the printer to remove it.
Remove the staple cartridge
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.
Recycle and unpack
Push the staple cartridge straight into the printer to install it.
Install the staple cartridge
Close the stapler door.
Close the stapler door