Before Working Inside Your Computer - Dell OptiPlex 330 User Manual

In Microsoft
, in the lower-left corner of the desktop, click the arrow in the
lower-right corner of the Start menu as shown below, and then click
Shut Down.
The computer turns off after the operating system shutdown process is
complete.
2 Ensure that the computer and all attached devices are turned off. If your
computer and attached devices did not automatically turn off when you
shut down your operating system, press and hold the power button for
about 4 seconds to turn them off.

Before Working Inside Your Computer

Use the following safety guidelines to help protect your computer from
potential damage and to help to ensure your own personal safety.
CAUTION:
safety instructions in the Product Information Guide.
CAUTION:
other unexpected injuries, always unplug your computer from the electrical outlet
before opening the cover.
CAUTION:
computer cover, bezels, filler brackets, and front panels.
NOTICE:
or contacts on a card. Hold a card by its edges or by its metal mounting bracket.
Hold a component such as a processor by its edges, not by its pins.
NOTICE:
computer. Damage due to servicing that is not authorized by Dell is not covered by
your warranty.
NOTICE:
on the cable itself. Some cables have connectors with locking tabs; if you are
disconnecting this type of cable, press in on the locking tabs before you disconnect
144
Adding and Replacing Parts
®
Windows Vista™, click the Windows Vista Start button
Before you begin any of the procedures in this section, follow the
To guard against electrical shock, laceration by moving fan blades, or
Do not operate your computer with any covers removed, such as the
Handle components and cards with care. Do not touch the components
Only a certified service technician should perform repairs on your
When you disconnect a cable, pull on its connector or on its pull-tab, not