HP Color LaserJet 4730 Multifunction Printer series - Manual (Page 199)

Troubleshooting the output accessories
When the 3-bin mailbox or the stapler/stacker is installed correctly with the output accessory bridge, the
LED at the top of the accessory is lit green. If the LED is off, is blinking, or is lit amber, a problem exists.
See
Understanding accessory lights for the 3-bin mailbox and stapler/stacker . For information about
clearing jams, see Clearing jams .
1 LED for the stapler/stacker
2 LED for the 3-bin mailbox
ENWW Troubleshooting the output accessories 179