Dell OptiPlex GX620 - Manual (Page 21)

Quick Reference Guide
21
Before Working Inside Your Computer
Use the following safety guidelines to help protect your computer from potential damage and to
help ensure your own personal safety.
CAUTION:
Before you begin any of the procedures in this section, follow the safety instructions in the
Product Information Guide.
NOTICE:
Only a certified service technician should perform repairs on your computer. Damage due to
servicing that is not authorized by Dell is not covered by your warranty.
NOTICE:
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 you disconnect 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.
To avoid damaging the computer, perform the following steps before you begin working inside
the computer.
1 Turn off your computer if it is not already turned off.
NOTICE:
To disconnect a network cable, first unplug the cable from your computer and then unplug it
from the network wall jack.
2 Disconnect any telephone or telecommunication lines from the computer.
3 Disconnect your computer and all attached devices from their electrical outlets, and then
press the power button to ground the system board.
4 Remove the computer stand, if it is attached.
CAUTION:
To guard against electrical shock, always unplug your computer from the electrical outlet
before removing the cover.
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.
Mini Tower Computer
NOTICE:
Before touching anything inside your computer, ground yourself by touching an unpainted
metal surface. While you work, periodically touch an unpainted metal surface to dissipate any static
electricity that could harm internal components.
1 Follow the procedures in "Before You Begin" on page 20.
2 If you have installed a padlock through the padlock ring on the back panel, remove the
padlock.
3 Lay the computer on its side as shown in the following illustration.
4 Slide the cover release latch back as you lift the cover.