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Precautionary Measures
Use the following safety guidelines to help protect your computer from potential damage
and to ensure your own personal safety.
CAUTION: Before you begin any of the procedures in this section, follow the
safety instructions on page 13.
CAUTION: Do not attempt to service the computer yourself, except as explained
in your online Dell™ documentation or in instructions otherwise provided to you
by Dell. Always follow installation and service instructions closely.
NOTICE: To help avoid possible damage to the system board, wait 5 seconds (or wait until the
standby light is extinguished) after turning off the computer and unplugging the power cable
before removing a component from the system board or disconnecting a device from the
computer.
Before you start to work on the computer, perform the following steps in the sequence
listed:
Shut down the computer through the Start menu.
1
Ensure that your computer and attached devices are turned off. If your computer and
2
attached devices did not automatically turn off when you shut down your computer,
turn them off now.
NOTICE: To disconnect a network cable, first unplug the cable from your computer and then
unplug it from the network wall jack.
Disconnect any telephone or telecommunication lines from the computer.
3
Disconnect your computer and all attached devices from electrical outlets, and then
4
press the power button to ground the system board.
NOTICE: Before touching anything inside your computer, ground yourself by touching an
unpainted metal surface, such as the metal at the back of the computer. While you work,
periodically touch an unpainted metal surface to dissipate any static electricity that could harm
internal components.
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, ensure that both connectors are
correctly oriented and aligned.
Rem ov i ng a n d I n s t a l l i n g Par t s
81
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