Removing and installing parts, Removing the computer cover – Dell Dimension E521 User Manual
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Removing and Installing Parts
Dell™ Dimension™ E521 Service Manual
This chapter provides procedures for removing and installing the components in your computer. Unless otherwise noted, each procedure assumes that the
following conditions exist:
l
You have performed the steps in
Turning Off Your Computer
and
Before Working Inside Your Computer
.
l
You have read the safety information in your Dell™
Product Information Guide.
l
A component can be replaced by performing the removal procedure in reverse order.
l
You have the tools listed in
Recommended Tools
.
Removing the Computer Cover
1.
Follow the procedures in
Before You Begin
.
2.
Lay your computer on its side with the computer cover facing up.
3.
Pull back the cover release latch located on the top panel.
CAUTION:
Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
CAUTION:
To guard against electrical shock, always unplug your computer from the electrical outlet before removing the cover.
CAUTION:
When working inside the computer, be aware that the heat sink assembly, power supply, and other components may be very hot
during normal operation. Be sure that components have had sufficient time to cool before you touch them.
NOTICE:
To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your
computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.
NOTICE:
Ensure that sufficient space exists to support the removed cover—at least 30 cm (1 ft) of desk top space.
NOTICE:
Ensure that you are working on a level, protected surface to avoid scratching either the computer or the surface on which it is resting.