Dell OptiPlex GX50, User Manual

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9
Safety Instructions
When Working Inside Your Computer
Before you open the computer cover, perform the following steps in the
sequence indicated.
NOTICE:
Do not attempt to service the computer yourself, except as
explained in your online Dell documentation or otherwise provided to you.
Always follow installation and service instructions closely.
NOTICE:
To help avoid possible damage to the system board, wait 5 seconds
after turning off the computer before removing a component from the system
board or disconnecting a device from the computer.
1
Perform an orderly computer shutdown using the operating system
menu.
2
Turn off your computer and any devices.
3
Ground yourself by touching an unpainted metal surface on the
chassis, such as the metal around the card-slot openings at the back of
the computer, before touching anything inside your computer.
While you work, periodically touch an unpainted metal surface on the
computer chassis to dissipate any static electricity that might harm
internal components.
4
Disconnect your computer and devices from their power sources. Also,
disconnect any telephone or telecommunication lines from the
computer.
Doing so reduces the potential for personal injury or shock.
In addition, take note of these safety guidelines when appropriate:
• When you disconnect a cable, pull on its connector or on its strain-
relief loop, not on the cable itself. Some cables have a connector with
locking tabs; if you are disconnecting this type of cable, press in on the
locking tabs before disconnecting the cable. As you pull connectors
apart, keep them evenly aligned to avoid bending any connector pins.
Also, before you connect a cable, make sure both connectors are
correctly oriented and aligned.