HP apollo 4200 gen9 Maintenance And Service Manual page 112

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.
Remove the right rack ear assembly:
5.
Remove the screws behind the right rack ear.
a.
Carefully open the right rack ear from behind, and then disconnect the front I/O cable.
b.
This action releases the right rack ear assembly from the chassis.
Removal and replacement procedures 112