Dell Inspiron 14 - N4050 User Manual - Page 5

Back to Contents Page Before You Begin Dell Inspiron M4040/14-N4050 Owner's Manual Recommended Tools Turning Off Your Computer Before Working Inside Your Computer This manual provides procedures for removing and installing components in your computer. Before you begin any procedure in this book, ensure that: l You have performed the steps in Turning Off Your Computer and Before Working Inside Your Computer. l You have read the safety information that shipped with your computer. l A component can be replaced or-if purchased separately-installed by performing the removal procedure in the reverse order. Recommended Tools The procedures in this document may require the following tools: l Small flat-blade screwdriver l Phillips screwdriver l Plastic scribe l BIOS executable update program available at support.dell.com Turning Off Your Computer CAUTION: To avoid losing data, save and close all open files and exit all open programs before you turn off your computer. 1. Save and close all open files and exit all open programs. 2. Click Start and then click Shut Down. The computer turns off after the operating system shutdown process is completed. 3. Ensure that the computer is turned off. If your computer did not automatically turn off when you shut down the operating system, press and hold the power button until the computer turns off. Before Working Inside Your Computer Use the following safety guidelines to help protect your computer from potential damage and to ensure your own personal safety. WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance. CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface (such as a connector on your computer). CAUTION: 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. CAUTION: 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. CAUTION: When you disconnect a cable, pull on its connector or on its pull-tab, not on the cable itself. Some cables have connectors 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. CAUTION: 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.