HP LaserJet M2727 Multifunction Printer series - Manual (Page 168)

Load staples
Each staple cassette holds 1,500 unformed staples.
1. Open the stapler door.
NOTE: Opening the stapler door disables the stapler.
Instructions and replacement staples part numbers are listed on the stapler door.
2. If you are replacing a staple cassette (for example, if the staple cassette has run out of staples),
remove the staple cassette from the product.
3. Insert a new staple cassette into the opening inside the staple door.
4. Close the stapler door.
156 Chapter 11 Manage and maintain the product ENWW