Before working inside your
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
Save and close all open files and exit all open applications.
Shut down your computer.
– Windows 8.1: On the Start screen, click or tap the power icon
– 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 shut-down
Disconnect your computer and all attached devices from their electrical
Disconnect all cables such as telephone cables, network cables and so
on, from your computer.
Disconnect all attached devices and peripherals, such as keyboard,
mouse, monitor, and so on, from your computer.
Remove any media card and optical disc from your computer, if
Use the following safety guidelines to protect your computer from potential
damage and ensure your personal safety.