HP apollo 4200 gen9 Maintenance And Service Manual page 117

Remove all power:
2.
Disconnect each power cord from the power source.
a.
Disconnect each power cord from the server.
b.
Remove the server from the rack (on page 33).
3.
Pull down the front drive cage release latches and use them to completely extend the front drive
4.
cages from the chassis.
LFF chassis
o
SFF chassis
o
Remove the air blocker for the front drive cage 2 backplane.
5.
Removal and replacement procedures 117