HP LaserJet 9040.9050 Multifunction Printer series - Manual (Page 141)

ENWW Clearing jams 137
7 Reinstall the staple cartridge.
8 Close the stapler unit door.
9 Push the stacker/stapler back into place.
Note The stapler needs to reload after clearing a staple jam, so the first few documents (no more than
five) might not be stapled. If a print job is sent and the stapler is jammed or is out of staples, the
job will still print as long as the path to the output bin is not blocked.