Dell XPS 420, Руководство пользователя

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100
Removing and Installing Parts
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 perform any of the procedures in this section, follow the
safety instructions in the Product Information Guide .
CAUTION:
When working inside the computer, be aware that the processor
heat-sink assembly, power supply, graphics card, and other components may be
very hot during normal operation. Be sure that they have sufficient time to cool
before you touch them.
NOTICE:
Handle components and cards with care. Do not touch the components
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:
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.
NOTICE:
To avoid damaging the computer, perform the following steps before you
begin working inside the computer.
1
Ensure that the work surface is flat and clean to prevent the computer
cover from being scratched.
2
Turn off your computer (see "Turning Off Your Computer" on page 99).
NOTICE:
To disconnect a network cable, first unplug the cable from your computer
and then unplug it from the network wall jack.
3
Disconnect all telephone or network cables from the computer.
4
Disconnect your computer and all attached devices from their electrical
outlets, and then 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.
book.book Page 100 Tuesday, November 27, 2007 10:29 AM