HP LaserJet Enterprise M4555 MFP series User Manual
Page 281
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3.
Loosen and remove the two retaining screws holding the cover for the EIO slot, and then remove
the cover. You will not need these screws and the cover again. They can be discarded.
4.
Firmly insert the HP Jetdirect print server card into the EIO slot.
ENWW
Install external I/O devices
261
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