Dell Vostro A840 Service Manual

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Dell Vostro A840 Service Manual Manual pdf 5 page image

Back to Contents PageBefore You BeginDell™ Vostro™ A840/A860 Service ManualRecommended ToolsTurning Off Your ComputerBefore Working Inside Your ComputerThis section provides procedures for removing and installing the components in your computer. Unless otherwise noted, each procedure assumes that thefollowing conditions exist:l You have performed the steps in Turning Off Your Computer and Before Working Inside Your Computer.l You have read the safety information shipped with your computer.l A component can be replaced or—if purchased separately—installed by performing the removal procedure in reverse order.Recommended ToolsThe procedures in this document may require the following tools:l Small flat-blade screwdriverl Phillips screwdriverl Flash BIOS update program CDTurning Off Your Computer1. Save and close all open files and exit all open programs.2. Click Start , click the arrow , and then click Shut Down.The computer turns off after the operating system shutdown process finishes.3. Ensure that the computer and all attached devices are turned off. If your computer and attached devices did not automatically turn off when you shutdown your operating system, press and hold the power button until the computer turns off.Before Working Inside Your ComputerUse the following safety guidelines to help protect your computer from potential damage and to help to ensure your own personal safety.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).NOTICE: To avoid losing data, save and close all open files and exit all open programs before you turn off your computer.CAUTION: Before working inside your computer, read the safety information that shipped with your computer. For additional safety bestpractices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.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 metalmounting bracket. Hold a component such as a processor by its edges, not by its pins.CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs asauthorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is notauthorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.NOTICE: When you disconnect a cable, pull on its connector or on its pull-tab, not on the cable itself. Some cables have connectors with lockingtabs; if you are disconnecting this type of cable, press in on the locking tabs before you disconnect the cable. As you pull connectors apart, keepthem evenly aligned to avoid bending any connector pins. Also, before you connect a cable, ensure that both connectors are correctly orientedand aligned.NOTICE: To avoid damaging the computer, perform the following steps before you begin working inside the computer.