HP Color LaserJet 4700 Printer series - Manual (Page 245)

6. Place the stapler cartridge in the stapler unit. Press it down until it snaps into place.
7. Close the stapler cartridge cover.
NOTE The stapler needs to reload after clearing a staple jam, so the first few documents (up
to five) might not be stapled. The stapler/stacker might make a noise as the stapler reloads
staples. The noise will stop after a few documents are stapled. If a print job is sent and the stapler
is jammed or out of staples, the job will still print as long as the path to the stacker bin is not
blocked.
ENWW Clearing jams 229