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Opening your system
Caution: Before you proceed, make sure that you have turned off your system and all peripherals connected to it. Read the “Preinstallation instructions” on page 49.
You need to open your system before you can install additional components. The system housing has one front panel door and one removable side panel. See the following section for instructions.
Opening the front panel door
A security lock secures the front panel door to protect your system unit against unauthorized access.
To open the front panel door:
1Insert the key into the lock and turn it clockwise until it points to the unlocked icon 
.
2Pull open the front panel door.
Removing the front panel door
The front panel door is attached to the main housing by screwless hinges. Follow these steps to remove the door:
1Unlock the door with the key (when necessary).
2Open it to more than a 45° angle.
