
8Safety Instructions
www.dell.com | support.dell.com
•Do not push any objects into the openings of your computer. Doing so 
can cause fire or electric shock by shorting out interior components.
•Keep your computer away from radiators and heat sources. Also, do 
not block cooling vents. Avoid placing loose papers underneath your 
computer; do not place your computer in a closed-in wall unit or on a 
bed, sofa, or rug.
When Working Inside Your Computer
Before you remove the computer cover, perform the following steps in the 
sequence indicated.
 NOTICE: Do not attempt to service the computer yourself, except as 
explained in this guide and elsewhere in Dell documentation. Always follow 
installation and service instructions closely.
1Turn off your computer and all devices.
2Ground yourself by touching an unpainted metal surface at the back of 
the computer before touching anything inside your computer.
While you work, periodically touch an unpainted metal surface on the 
computer to dissipate any static electricity that might harm internal 
components.
3Disconnect any devices connected to the computer, including the 
monitor, from their electrical outlets to reduce the potential for 
personal injury or shock. Also, disconnect any telephone or 
telecommunication lines from the computer.
4Disconnect the power cable to your computer, and then press the 
power button to ground the system board.
In addition, take note of these safety guidelines when appropriate:
•When you disconnect a cable, pull on its connector, not on the cable 
itself. As you pull connectors apart, keep them evenly aligned to avoid 
bending any pins. Also, before you connect a cable, make sure that 
both connectors are correctly oriented and aligned.
•Handle components and cards with care. Don’t touch the components 
on a card. Hold a card by its edges or by its metal bracket.
 CAUTION: There is a danger of a new battery exploding if it is 
incorrectly installed. Replace the battery only with the same or 
equivalent type recommended by the manufacturer. Discard used 
batteries according to the manufacturer’s instructions.