Before working inside yourcomputerNOTE: The images in this document may differ from your computerdepending on the configuration you ordered.Before you begin1 Save and close all open files and exit all open applications.2 Shut down your computer.– Windows 10: Click or tap Start → Power → Shut down.– 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 thedocumentation of your operating system for shut-downinstructions.3 Disconnect your computer and all attached devices from their electricaloutlets.4 Disconnect all cables such as telephone cables, network cables and soon, from your computer.5 Disconnect all attached devices and peripherals, such as keyboard,mouse, monitor, and so on, from your computer.6 Remove any media card and optical disc from your computer, ifapplicable.7 After the computer is unplugged, press and hold the power button for 5seconds to ground the system board.Safety instructionsUse the following safety guidelines to protect your computer from potentialdamage and ensure your personal safety.8
