10.With the components facing the left edge of the printer, slide the card assembly into the printer. Align the top and bottom of the assembly with the top and bottom guide rails located inside the printer. Press the cards into the slot until the cards are firmly seated.
CAUTION The assembly must fit into the guide rails correctly. Failure to install the assembly correctly may cause damage to the formatter board or to the MIO assembly.
Insertion of two cards into HP LaserJet 4Si/4SiMX
11.Secure the assembly to the printer by tightening the remaining three thumbscrews a little at a time, alternating between each side until all of the screws are secure.
12.Connect the network cable.
13.Connect the power cord and turn on the printer.