HP J Class Owner's Manual page 136

Closing the
System Unit
B-8
Perform the following steps to close the system unit:
CAUTION: Do not attempt to operate the workstation with
the front cover removed. The cover is needed
for proper air flow for system cooling.
1.
Insert the two guide pins on the bottom of the front cover into
the guides on the bottom of the system unit.
2.
Swing the front cover up, and push it firmly into the workstation
housing. The front panel edges automatically align with the
workstation housing, and the top latch buttons pop up into posi-
tion. See Figure A–2.
NOTICE: To maintain FCC/EMI compliance, verify that
the top latches snap completely into position.