Before working inside your computer
Save and close all open files and exit all open applications.
Shut down your computer. For Windows operating system, click Start > Power button Power > Shut down.
NOTE :If you are using a different operating system, see the documentation of your operating system for shut-down instructions.
Turn off all the attached peripherals.
Disconnect your computer and all attached devices from their electrical outlets.
Disconnect all attached network devices and peripherals, such as keyboard, mouse, and monitor from your computer.
CAUTION: To disconnect a network cable, unplug the cable from your computer.
Remove any media card and optical disc from your computer, if applicable
Removing the side cover:
Pull up the cover release latch, and lift the cover upwards to remove it from the computer.
Installing the side cover:
Align the cover along its tabs on the chassis of the computer.
Press down on the cover till it clicks into place.
Follow the procedure in After working inside your computer.
Replace all screws and ensure that no stray screws remain inside your computer.
Connect any external devices, peripherals, or cables you removed before working on your computer.
Replace any media cards, discs, or any other components that you removed before working on your computer.
Connect your computer and all attached devices to their electrical outlets.
Turn on your computer.
