Before Working Inside Your Computer
CAUTION: To avoid damaging the components and cards, handle them by their edges and avoid touching pins and contacts.
NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
Before You Begin
1Save and close all open files and exit all open applications.
2Shut down your computer.
–Windows 8.1: On the Start screen, click or tap the power icon 
→ Shut down.
–Windows 7: Click or tap Start → Shut down.
NOTE: If you are using a different operating system, see the documentation of your operating system for
3Disconnect your computer and all attached devices from their electrical outlets.
4Disconnect all cables such as telephone cables, network cables and so on, from your computer.
5Disconnect all attached devices and peripherals, such as keyboard, mouse, monitor, and so on, from your computer.
6Remove any media card and optical disc from your computer, if applicable.
7After the computer is unplugged, press and hold the power button for 5 seconds to ground the system board.
Safety Instructions
Use the following safety guidelines to protect your computer from potential damage and ensure your personal safety.
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