Dell Inspiron 15 7557 Service Manual - Page 9
Before working inside your computer, Before you begin, Safety instructions
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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 1 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 the documentation of your operating system for shut-down instructions. 3 Disconnect your computer and all attached devices from their electrical outlets. 4 Disconnect all cables such as telephone cables, network cables and so on, 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, if applicable. Safety instructions Use the following safety guidelines to protect your computer from potential damage and ensure your personal safety. 9