Dell Inspiron 15 5551 Service Manual - Page 10

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 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. 7 After 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. 10

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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 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.
7
After 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.
10