Safety First-For You And Your Computer; Opening The Computer Cover - Dell Precision 340 Guía De Instalación Y De Referencia Rápida

Safety First—For You and Your
Computer
While working inside your computer, do not attempt to service the
computer except as explained in this guide and elsewhere in Dell
documentation. Always follow the instructions closely.
Working inside your computer is safe—if you observe the following
precautions.
CAUTION: FOR YOUR PERSONAL SAFETY AND PROTECTION OF
THE EQUIPMENT
Before you start to work on the computer, perform the following steps in the
sequence indicated:
Turn off the computer and all devices.
1
Touch an unpainted metal surface on the computer, such as the metal
2
around the card-slot openings at the back of your computer, before
touching anything inside your computer.
Disconnect the computer and devices from their electrical outlets.
3
Doing so reduces the potential for personal injury or shock. Also
disconnect any telephone or telecommunication lines from the
computer.
While you work, periodically touch an unpainted metal surface on the
computer to dissipate any static electricity that might harm internal
components.
In addition, Dell recommends that you periodically review the safety
instructions in the documentation that came with your computer.

Opening the Computer Cover

You may need to open the computer cover if you are going to remove or
install a part, reset a forgotten password, or diagnose a computer problem.
CAUTION: Before you perform this procedure, see "Safety First—
For You and Your Computer" on page 29.
NOTE: Before
disconnecting a device
from the computer or
removing a component
from the system board,
verify that the standby
power light on the system
board has turned off. See
the interior service label
located on the inside of
the cover to locate the
standby power light.
Setup and Quick Re ference Guide
29