08 08
/
CHAPTER 1: BEFORE YOU BEGIN 
Ensure that the work surface is at and clean.1. 
Turn o your computer (see “Turning O Your Computer” on page 2.  7).
CAUTION:  To  disconnect  a  network  cable,  rst  unplug  the  cable  from 
your computer and then unplug the cable from the network device.
Disconnect all telephone or network cables from the computer.3. 
Disconnect your computer and all attached devices from their electrical 4. 
outlets.
Disconnect all attached devices from your computer.5. 
Press and eject any installed cards from the Media Card Reader.6. 
Press and hold the power button to ground the system board.7. 
CAUTION: 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 static electricity, which could harm internal 
components.
NOTE: For  better access  to  components  within  your  computer,  lay your 
computer on its side.
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.
WARNING: Before you begin any of the procedures in this section, follow 
the safety instructions that shipped with your computer. For additional 
safety best practices information, see the Regulatory Compliance 
Homepage at www.dell.com/regulatory_compliance. 
CAUTION: Only a certied service technician should perform repairs on 
your computer. Damage due to servicing that is not authorized by Dell is 
not covered by your warranty.
CAUTION: When you disconnect a cable, pull on its connector or on its 
pull-tab, not onthecableitself. Some cableshaveconnectorswithlocking 
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. 
CAUTION: To avoid damaging the computer, perform the following steps 
before you begin working inside the computer.