HP LaserJet 9000 Printer series - Manual (Page 111)

7 Problem solving 111
Clearing jams
9 Reattach the stapler/stacker to the product.
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.
7 9